<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1981-8114</journal-id>
<journal-title><![CDATA[Boletim do Museu Paraense Emílio Goeldi Ciências Naturais]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Mus. Para. Emilio Goeldi Cienc. Nat.]]></abbrev-journal-title>
<issn>1981-8114</issn>
<publisher>
<publisher-name><![CDATA[Museu Paraense Emílio Goeldi, Ministério da Ciência e Tecnologia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1981-81142010000300007</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Samambaias e licófitas do município de Caxias, Maranhão, Brasil]]></article-title>
<article-title xml:lang="en"><![CDATA[Ferns and lycophytes from municipality of Caxias, state of Maranhão, Brazil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernandes]]></surname>
<given-names><![CDATA[Rozijane Santos]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Conceição]]></surname>
<given-names><![CDATA[Gonçalo Mendes da]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa]]></surname>
<given-names><![CDATA[Jeferson Miranda]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paula-Zárate]]></surname>
<given-names><![CDATA[Eliete Lima de]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Museu Paraense Emílio Goeldi Coordenação de Botânica ]]></institution>
<addr-line><![CDATA[Belém Pará]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidade Estadual do Maranhão  ]]></institution>
<addr-line><![CDATA[Caxias Maranhão]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Instituto Federal de Educação Ciência e Tecnologia do Pará ]]></institution>
<addr-line><![CDATA[Abaetetuba Pará]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Universidade Federal da Paraíba  ]]></institution>
<addr-line><![CDATA[João Pessoa Paraíba]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2010</year>
</pub-date>
<volume>5</volume>
<numero>3</numero>
<fpage>345</fpage>
<lpage>356</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_arttext&amp;pid=S1981-81142010000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_abstract&amp;pid=S1981-81142010000300007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iec.gov.br/scielo.php?script=sci_pdf&amp;pid=S1981-81142010000300007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[O presente estudo refere-se ao inventário das samambaias e licófitas do município de Caxias (Maranhão, Brasil), representando um segundo trabalho com estes grupos de plantas no estado. Considerando que são plantas pouco inventariadas no Maranhão, compreendemos ser de importância o estudo da sua composição florística para o conhecimento da diversidade da flora como um todo. O município possui uma área de 531.350 ha e está localizado na parte leste do Maranhão, onde a cobertura vegetal é caracterizada pelo contato do cerrado com a floresta, havendo predomínio do primeiro. Para a coleta do material botânico e registro das informações ecológicas das espécies, foram realizadas excursões bimestrais entre novembro de 2005 a agosto de 2007, nas quais foram registradas 11 famílias, 14 gêneros e 21 espécies. As famílias mais representativas foram Pteridaceae (cinco espécies) e Thelypteridaceae (quatro espécies). Seis espécies foram citadas como novos registros para o Maranhão [Selagínella erythropus (Mart.) Spring, S. flagellata Spring, Acrostichum danaeifolium Langsd. & Fisch., Adiantum serratodentatum Humb. & Bonpl. ex Willd., Lindsaea divaricata Klotzsch e Salvinia auriculata Aubl.]. A maioria das espécies apresentou habitat terrestre, ocorreu no interior das matas ciliares e apresentou distribuição americana.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[This study presents an inventory of the ferns and lycophytes from the Caxias municipality (Maranhão State, Brazil), which is the second work with these plant groups in the state. Whereas plants are very poorly sampled in Maranhão, we understand to be important to study the floristic composition of these groups for the knowledge of plant diversity as a whole. The municipality has 531,350 ha of area and is located in the eastern side of the state, where the vegetation cover is characterized by the contact between cerrado and forest. The material was collected between November 2005 and August 2007. The 21 registered species belong to 14 genera and 11 families, among which the richest was Pteridaceae (five species), followed by Thelypteridaceae (four species). Six species were cited as new registers to Maranhão [Selaginella erythropus (Mart.) Spring, S. flagellata Spring, Acrostichum danaeifolium Langsd. & Fisch., Adiantum serratodentatum Humb. & Bonpl. ex Willd., Lindsaea divaricata Klotzsch and Salvinia auriculata Aubl.]. The majority of the species was terrestrial, occurred inside the forests and presented American distribution.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Florística]]></kwd>
<kwd lng="pt"><![CDATA[Samambaias]]></kwd>
<kwd lng="pt"><![CDATA[Nordeste do Brasil]]></kwd>
<kwd lng="en"><![CDATA[Floristic]]></kwd>
<kwd lng="en"><![CDATA[Ferns]]></kwd>
<kwd lng="en"><![CDATA[Northeastern Brazil]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p><font size="4" face="Verdana"><b><a name="topo"></a>Samambaias e lic&oacute;fitas do munic&iacute;pio de Caxias, Maranh&atilde;o, Brasil</b></font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana"><b>Ferns and lycophytes from  municipality of Caxias, state of Maranh&atilde;o, Brazil</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana"><b>Rozijane Santos Fernandes<sup>I</sup>; Gon&ccedil;alo  Mendes da Concei&ccedil;&atilde;o<sup>II</sup>; Jeferson Miranda Costa<sup>III</sup>; Eliete  Lima de Paula-Z&aacute;rate<sup>IV</sup></b></font></p>     <p><font size="2" face="Verdana"><sup>I</sup>Museu Paraense Em&iacute;lio Goeldi. Coordena&ccedil;&atilde;o de Bot&acirc;nica. Bel&eacute;m, Par&aacute;, Brasil (<a href="mailto:rozijanef@hotmail.com">rozijanef@hotmail.com</a>)    <br>     <sup>II</sup>Universidade Estadual do Maranh&atilde;o. Caxias, Maranh&atilde;o, Brasil (<a href="mailto:G_12@hotmail.com">G_12@hotmail.com</a>)    <br>     <sup>III</sup>Instituto Federal de Educa&ccedil;&atilde;o,  Ci&ecirc;ncia e Tecnologia do Par&aacute;. Abaetetuba, Par&aacute;, Brasil (<a href="mailto:jeferson.m.costa@hotmail.com">jeferson.m.costa@hotmail.com</a>)    <br>     <sup>IV</sup>Universidade Federal da Para&iacute;ba.  Jo&atilde;o Pessoa, Para&iacute;ba, Brasil (<a href="mailto:lilazarat@hotmail.com">lilazarat@hotmail.com</a>)</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"><a href="#endereco">Endere&ccedil;o para correspond&ecirc;ncia</a></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p> <hr size="1" noshade>     <p><font size="2" face="Verdana"><b>RESUMO</b></font></p>     <p><font size="2" face="Verdana">O presente estudo refere-se ao invent&aacute;rio das samambaias e lic&oacute;fitas do munic&iacute;pio de Caxias (Maranh&atilde;o,  Brasil), representando um segundo trabalho com estes grupos de plantas no  estado. Considerando que s&atilde;o plantas pouco inventariadas no Maranh&atilde;o,  compreendemos ser de import&acirc;ncia o estudo da sua composi&ccedil;&atilde;o flor&iacute;stica para o  conhecimento da diversidade da flora como um todo. O munic&iacute;pio possui uma &aacute;rea  de 531.350 ha e est&aacute; localizado na  parte leste do Maranh&atilde;o, onde a cobertura vegetal &eacute; caracterizada pelo contato do cerrado com a floresta, havendo predom&iacute;nio do primeiro. Para a coleta do material bot&acirc;nico e registro das informa&ccedil;&otilde;es ecol&oacute;gicas das esp&eacute;cies,  foram realizadas excurs&otilde;es bimestrais entre novembro de 2005 a agosto de 2007, nas quais foram registradas 11 fam&iacute;lias, 14 g&ecirc;neros e 21 esp&eacute;cies. As fam&iacute;lias mais representativas foram Pteridaceae (cinco  esp&eacute;cies) e Thelypteridaceae (quatro esp&eacute;cies). Seis esp&eacute;cies foram citadas  como novos registros para o Maranh&atilde;o <i>[Selag&iacute;nella erythropus </i>(Mart.) Spring, <i>S. flagellata </i>Spring, <i>Acrostichum  danaeifolium </i>Langsd. &amp; Fisch., <i>Adiantum serratodentatum </i>Humb. &amp; Bonpl. ex Willd., <i>Lindsaea divaricata </i>Klotzsch e <i>Salvinia  auriculata </i>Aubl.]. A maioria das esp&eacute;cies apresentou <i>habitat </i>terrestre,  ocorreu no interior das matas ciliares e apresentou distribui&ccedil;&atilde;o americana.</font></p>     <p><font size="2" face="Verdana">    <b>Palavras-chave: </b>Flor&iacute;stica.  Samambaias. Nordeste do Brasil.</font></p> <hr size="1" noshade>     <p><font size="2" face="Verdana"><b>ABSTRACT</b></font></p>     <p><font size="2" face="Verdana">This study presents an inventory of the ferns and lycophytes from the Caxias  municipality (Maranh&atilde;o State,   Brazil), which  is the second work with these plant groups in the state. Whereas plants are  very poorly sampled in Maranh&atilde;o, we understand to be important to study the  floristic composition of these groups for the knowledge of plant diversity as a  whole. The municipality has 531,350   ha of area and is located in the eastern side of the  state, where the vegetation cover is characterized by the contact between cerrado  and forest. The material was collected between November 2005 and August 2007.  The 21 registered species belong to 14 genera and 11 families, among which the  richest was Pteridaceae (five species), followed by Thelypteridaceae (four  species). Six species were cited as new registers to Maranh&atilde;o <i>[Selaginella  erythropus </i>(Mart.) Spring, <i>S. flagellata </i>Spring, <i>Acrostichum  danaeifolium </i>Langsd. &amp; Fisch., <i>Adiantum serratodentatum </i>Humb. &amp;  Bonpl. ex Willd., <i>Lindsaea divaricata </i>Klotzsch and <i>Salvinia  auriculata </i>Aubl.]. The majority of the species was terrestrial, occurred  inside the forests and presented American distribution.</font></p>     <p><font size="2" face="Verdana">  <b>Keywords: </b>Floristic. Ferns. Northeastern   Brazil.</font></p> <hr size="1" noshade>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font size="3" face="Verdana"><b>INTRODU&Ccedil;&Atilde;O</b></font></p>     <p><font size="2" face="Verdana"> As plantas vasculares sem sementes (samambaias e  lic&oacute;fitas), tradicionalmente conhecidas como pterid&oacute;fitas, incluem os vegetais  popularmente chamados de samambaias, havendo ainda esp&eacute;cies denominadas de  avencas, fetos e cavalinhas. Possuem ampla distribui&ccedil;&atilde;o mundial, com muitas  esp&eacute;cies cosmopolitas vivendo preferencialmente nas regi&otilde;es tropicais, em  locais &uacute;midos e  sombreados das matas (Tryon &amp; Tryon, 1982).</font></p>     <p><font size="2" face="Verdana"> O total de esp&eacute;cies no mundo &eacute; estimado em 13.600  (Moran, 2008),  das quais cerca de 3.250  ocorrem nas Am&eacute;ricas (Tryon &amp;  Tryon, 1982).  Destas, cerca de 30%  podem ser encontradas no  territ&oacute;rio brasileiro, que abriga inclusive um dos centros de endemismo e  especia&ccedil;&atilde;o do continente (Windisch, 1990), localizado principalmente no dom&iacute;nio da Mata  Atl&acirc;ntica da regi&atilde;o Sudeste do Brasil.</font></p>     <p><font size="2" face="Verdana"> No que diz respeito &agrave; regi&atilde;o Nordeste, o primeiro  estudo representativo sobre a flora de plantas vasculares sem sementes est&aacute;  contido na &quot;Flora Brasiliensis&quot;, de Martius &amp;  Eichler (Baker, 1870;  Kuhn, 1884;  Milde, 1867;  Spring, 1840;  Sturm, 1859).  Esta flora, juntamente com os  estudos realizados desde ent&atilde;o, somam um total de 320 esp&eacute;cies para a regi&atilde;o,  destacando Pernambuco como um dos estados com a pteridoflora mais bem  conhecida, com 303 esp&eacute;cies (Barros <i>et al.</i>, 2002). Em condi&ccedil;&atilde;o de destaque, encontram-se  tamb&eacute;m os estados de Alagoas,  Cear&aacute; e Bahia pelo crescente n&uacute;mero de estudos flor&iacute;stico-taxon&ocirc;micos  desenvolvidos, ao contr&aacute;rio dos estados do Piau&iacute;, Rio Grande do Norte, Sergipe  e Maranh&atilde;o, que merecem mais estudos (Xavier, 2007).</font></p>     <p><font size="2" face="Verdana"> O estado do Maranh&atilde;o, por se tratar de uma &aacute;rea de  transi&ccedil;&atilde;o entre o bioma amaz&ocirc;nico e o cerrado, deve possuir uma grande  diversidade flor&iacute;stica em seu territ&oacute;rio. No entanto, em rela&ccedil;&atilde;o &agrave; sua flora de  samambaias e lic&oacute;fitas, foram citadas apenas 37 esp&eacute;cies de acordo com revis&otilde;es  e estudos regionais e locais, como os de Kramer (1957), Andrade-Lima (1969),  Alston <i>et al. </i>(1981),  Bastos &amp;  Cutrim   (1999), Moran (2000), Prado &amp; Windisch (2000),  Salino &amp; Semir (2004), Xavier (2007), Fernandes <i>et al. </i>(2007) e   de acordo com L. S. Sylvestre em sua tese de  doutorado, intitulada &quot;Revis&atilde;o taxon&oacute;mica das esp&eacute;cies de  Aspleniaceae A.B. Frank ocorrentes no Brasil&quot;, defendida em 2001.</font></p>     <p><font size="2" face="Verdana"> Dessa forma, o presente trabalho apresenta como objetivo a realiza&ccedil;&atilde;o do invent&aacute;rio das samambaias e lic&oacute;fitas  do munic&iacute;pio de Caxias, Maranh&atilde;o, uma contribui&ccedil;&atilde;o ao conhecimento flor&iacute;stico  deste grupo de plantas para o estado do Maranh&atilde;o e para a regi&atilde;o Nordeste do  Brasil.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana">  <b>MATERIAL E M&Eacute;TODOS</b></font></p>     <p><font size="2" face="Verdana"><b>LOCALIZA&Ccedil;&Atilde;O E CARACTERIZA&Ccedil;&Atilde;O DA &Aacute;REA DE ESTUDO</b></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> O Maranh&atilde;o situa-se numa zona de transi&ccedil;&atilde;o dos climas semi-&aacute;ridos  do interior do Nordeste para os &uacute;midos  equatoriais da Amaz&oacute;nia, sendo  dos estados nordestinos o que menos apresenta escassez de recursos h&iacute;dricos,  possuindo pelo menos dez bacias hidrogr&aacute;ficas perenes, como a do Itapecuru, que  banha a cidade de Caxias no m&eacute;dio curso do rio de mesmo nome (Montes, 1997).</font></p>     <p><font size="2" face="Verdana"> O munic&iacute;pio de Caxias (<a href="#f1">Figura 1</a>),  com &aacute;rea de 531.350 ha, localiza-se na parte leste do estado entre as coordenadas 04&deg;  53' 30&quot; S e 43&deg;  24' 53&quot; W, &agrave;s margens da  BR-316. O clima &eacute; do tipo sub&uacute;mido a semi-&aacute;rido, com pluviosidade anual entre 1.300  e 1.500 mm. A cobertura vegetal tem sido devastada para dar  lugar &agrave; agropecu&aacute;ria e &agrave; agricultura de subsist&ecirc;ncia, e est&aacute; representada pelo contato  do cerrado com a floresta, com o predom&iacute;nio do primeiro   (Montes, 1997).</font></p>     <p><a name="f1"></a></p>     <p>&nbsp;</p>     <p align="center"><img src="/img/revistas/bmpegcn/v5n3/3a07f1.gif" border="0"></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana">  <b>COLETA, HERBORIZA&Ccedil;&Atilde;O E IDENTIFICA&Ccedil;&Atilde;O</b></font></p>     <p><font size="2" face="Verdana"> Foram realizadas expedi&ccedil;&otilde;es bimestrais para coleta  de material bot&acirc;nico entre  novembro de 2005 e  agosto de 2007, priorizando os ambientes preferenciais das samambaias e lic&oacute;fitas,  as quais foram coletadas e herborizadas segundo a metodologia especificada por  Windisch (1990).</font></p>     <p><font size="2" face="Verdana"> A identifica&ccedil;&atilde;o dos  esp&eacute;cimes coletados foi  realizada mediante literatura especializada, como Alston <i>et al. </i>(1981), Berry <i>et al. </i>(1995), Mickel &amp;  Smith (2004), Moran &amp; Riba (1995), Smith (1992) e Tryon &amp; Stolze (1989).</font></p>     <p><font size="2" face="Verdana"> Em cada um desses grupos (samambaias e lic&oacute;fitas), os t&aacute;xons inferiores s&atilde;o citados a partir  de fam&iacute;lia e organizados em ordem alfab&eacute;tica. No grupo das lic&oacute;fitas, as  fam&iacute;lias foram circunscritas de acordo com Kramer  &amp; Green (1990)  e, para as samambaias, seguiu-se a circunscri&ccedil;&atilde;o  de fam&iacute;lias  proposta por Smith <i>et al. </i>(2006).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Os nomes dos autores dos  t&aacute;xons foram padronizados de acordo com Pichi-Sermolli (1996). O material  testemunho foi depositado nos Herb&aacute;rios Prisco Bezerra (EAC)  e Jo&atilde;o Mur&ccedil;a Pires  (MG) (siglas segundo o Index Herbariorum) (Holmgren <i>et al.</i>, 1990).</font></p>     <p><font size="2" face="Verdana">  <b>DISTRIBUI&Ccedil;&Atilde;O GEOGR&Aacute;FICA</b></font></p>     <p><font size="2" face="Verdana"> O  padr&atilde;o de distribui&ccedil;&atilde;o geogr&aacute;fica das esp&eacute;cies segue a classifica&ccedil;&atilde;o proposta  por Parris (2001) e Moran &amp; Smith  (2001),  modificada por Schwartsburd &amp; Labiak (2007), que classificam  as esp&eacute;cies em: 'circum-ant&aacute;rticas' (esp&eacute;cies presentes na Am&eacute;rica, &Aacute;frica,  &Aacute;sia e/ou Oceania), 'atl&acirc;nticas' (Am&eacute;rica, &Aacute;frica e, eventualmente, ilhas do  oceano Atl&acirc;ntico), 'pac&iacute;ficas' (Am&eacute;rica, &Aacute;sia e/ou Oceania), 'americanas'  (Am&eacute;ricas do Sul, Central e, eventualmente, do Norte) e 'sul-americanas'  (apenas nos pa&iacute;ses da Am&eacute;rica do Sul). </font></p>     <p><font size="2" face="Verdana"> A distribui&ccedil;&atilde;o geogr&aacute;fica  das esp&eacute;cies ao longo dos continentes e pa&iacute;ses da Am&eacute;rica foi baseada em Moran &amp;  Riba (1995), Berry <i>et al. </i>(1995), Mickel &amp; Smith (2004)  e nos demais estudos utilizados na identifica&ccedil;&atilde;o das esp&eacute;cies. A distribui&ccedil;&atilde;o  das esp&eacute;cies nos estados brasileiros foi organizada em ordem alfab&eacute;tica,  seguida das refer&ecirc;ncias. Os asteriscos (*) antes dos nomes das  esp&eacute;cies indicam os novos registros para o estado do Maranh&atilde;o.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana">  <b>RESULTADOS E DISCUSS&Atilde;O</b></font></p>     <p><font size="2" face="Verdana"> A flora de plantas  vasculares sem sementes do munic&iacute;pio de Caxias, Maranh&atilde;o, est&aacute; representada por  tr&ecirc;s esp&eacute;cies de lic&oacute;fitas, distribu&iacute;das em duas fam&iacute;lias e dois g&ecirc;neros, e 18  esp&eacute;cies de samambaias, distribu&iacute;das em nove fam&iacute;lias e 12 g&ecirc;neros.  Das 21 esp&eacute;cies registradas em Caxias, 13 foram coletadas na &Aacute;rea de Prote&ccedil;&atilde;o  Ambiental (APA) do Inhamum (Fernandes <i>et al.</i>, 2007), entre elas <i>Trichomanes  cristatum </i>Kaulf., <i>Lindsaea divaricata </i>Klotzsch, <i>Nephrolepis rivularis </i>(Vahl.)  Mett. e <i>Thelypteris  patens </i>(Sw.) Small., que s&oacute; foram registras na referida APA.</font></p>     <p><font size="2" face="Verdana"> Seis esp&eacute;cies s&atilde;o citadas  como novos registros para o estado do Maranh&atilde;o, sendo duas lic&oacute;fitas <i>[Selaginella erythropus </i>(Mart.) Spring e <i>S. flagellata </i>Spring] e quatro samambaias <i>[Acrostichum danaeifolium </i>Langsd. &amp;  Fisch., <i>Adiantum  serratodentatum </i>Humb. &amp; Bonpl. ex Willd., <i>Lindsaea divaricata </i>Klotzsch  e <i>Salvinia auriculata </i>Aubl.]. Na Reserva Florestal do Sacav&eacute;m, em S&atilde;o Lu&iacute;s, Maranh&atilde;o,  Bastos &amp; Cutrim  (1999) registraram 15  esp&eacute;cies, sendo todas citadas  pela primeira vez para o estado.</font></p>     <p><font size="2" face="Verdana"> Em Caxias, as fam&iacute;lias com maior riqueza espec&iacute;fica  foram Pteridaceae (com cinco esp&eacute;cies) e Thelypteridaceae (com quatro). Na  Reserva Florestal do Sacav&eacute;m, a fam&iacute;lia Pteridaceae (com cinco esp&eacute;cies) tamb&eacute;m  foi a mais representativa, enquanto Thelypteridaceae s&oacute; apresentou duas  esp&eacute;cies (Bastos &amp; Cutrim, 1999), ambas registradas em Caxias.</font></p>     <p><font size="2" face="Verdana"> A maioria das esp&eacute;cies (19)  apresentou habitat terrestre, e  apenas duas ocorreram como ep&iacute;fitas <i>[Nephrolepis biserrata </i>(Sw.) Schott.  e <i>Phlebodium aureum </i>(L.) J. Sm.] e uma como aqu&aacute;tica flutuante <i>(Salvinia  auriculata). </i>O baixo n&uacute;mero de esp&eacute;cies ep&iacute;fitas est&aacute; de acordo com a observa&ccedil;&atilde;o  de Rizzini (1997), segundo  a qual plantas ep&iacute;fitas s&atilde;o raras no cerrado. O predom&iacute;nio de esp&eacute;cies  terrestres em rela&ccedil;&atilde;o &agrave;s ep&iacute;fitas tamb&eacute;m foi constatado na Reserva Florestal do  Sacav&eacute;m, onde, de um total de 15 esp&eacute;cies registradas, apenas <i>Phlebodium decumanum </i>(Willd.)  J. Sm. e <i>Nephrolepis biserrata </i>cresciam em habitat epif&iacute;tico (Bastos &amp;  Cutrim, 1999). No entanto, por se  tratar de uma &aacute;rea com remanescentes de floresta amaz&ocirc;nica, o baixo n&uacute;mero de esp&eacute;cies ep&iacute;fitas em Sacav&eacute;m deve  estar relacionado ao intenso grau de desmatamento em que tal reserva se  encontrava na &eacute;poca das coletas, uma vez que, segundo Bautista <i>et al. </i>(1975),  samambaias ep&iacute;fitas s&atilde;o comuns na floresta amaz&ocirc;nica.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Com rela&ccedil;&atilde;o aos ambientes de ocorr&ecirc;ncia, a maioria  das esp&eacute;cies foi encontrada em extensas faixas de matas ciliares com  buritizais. Assim, com exce&ccedil;&atilde;o de <i>Lygodium venustum </i>Sw.,  que tamb&eacute;m foi coletada  no cerrado aberto, as demais  esp&eacute;cies ocorreram exclusivamente em matas ciliares, sendo encontradas em suas  margens e/ou em seu interior, bem como em ambientes alagados e abertos, associados  a essa forma&ccedil;&atilde;o. A prefer&ecirc;ncia das esp&eacute;cies pelas matas ciliares em detrimento  ao cerrado aberto est&aacute; relacionada com a tend&ecirc;ncia que estas plantas t&ecirc;m de se  estabelecer em locais sombreados e &uacute;midos das matas, onde s&atilde;o oferecidos os  microclimas apropriados para a reprodu&ccedil;&atilde;o sexual destas plantas (P&aacute;usas &amp;  S&aacute;ez, 2000). De  fato, estudos realizados no Nordeste brasileiro mostram uma flora mais diversa  em ambientes onde h&aacute; umidade no solo em decorr&ecirc;ncia da presen&ccedil;a de lagoas,  a&ccedil;udes, rios e brejos (Brade, 1940; Barros <i>et al.</i>, 1989a, b), o que foi confirmado no presente estudo.</font></p>     <p><font size="2" face="Verdana"> Com rela&ccedil;&atilde;o ao padr&atilde;o de distribui&ccedil;&atilde;o geogr&aacute;fica, 13  esp&eacute;cies s&atilde;o americanas, cinco  circum-ant&aacute;rticas, duas sul-americanas e uma pac&iacute;fica.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana">  <b>lista de t&aacute;xons e  tratamento das esp&eacute;cies</b></font></p>     <p><font size="2" face="Verdana"><b>lic&oacute;fitas</b></font></p>     <p><font size="2" face="Verdana"><b>Lycopodiaceae</b></font></p>     <p><font size="2" face="Verdana"><i>Lycopodiella cernua </i>(L.) Pic. Serm.</font></p>     <p><font size="2" face="Verdana">Plantas terrestres, coletadas &agrave;s margens de trilhas pr&oacute;ximas a brejos, em terreno  arenoso e &uacute;mido, formando  grandes popula&ccedil;&otilde;es expostas ao sol.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Circum-Ant&aacute;rtica. No  Brasil, foi citada para o Acre, Amap&aacute;, Amazonas, Bahia, Cear&aacute;, Esp&iacute;rito Santo,  Goi&aacute;s, Maranh&atilde;o, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Par&aacute;, Para&iacute;ba,  Paran&aacute;, Pernambuco, Rio de Janeiro, Rio Grande do Sul, Rond&ocirc;nia,  Roraima, Santa Catarina, Sergipe e S&atilde;o Paulo (Dutra, 1938; Brade, 1940; Sehnem, 1961; Behar &amp; Vi&eacute;gas, 1992; Bastos &amp; Cutrim, 1999; Melo &amp; Salino, 2002; Pietrobom &amp; Barros, 2006; Boldrin &amp; Prado, 2007; Maciel <i>et al., </i>2007;  Schwartsburd &amp;  Labiak, 2007;  Windisch &amp;  Ramos, 2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, APA do Inhamum, 03.11.2005, f&eacute;rtil, R. S. Fernandes &amp;  G. M. Concei&ccedil;&atilde;o 01  (MG); 08.11.2005,  f&eacute;rtil, R. S. Fernandes &amp;  G. M. Concei&ccedil;&atilde;o 05  (EAC, MG).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana">  <b>Selaginellaceae</b></font></p>     <p><font size="2" face="Verdana"><i>*Selaginella erythropus </i>(Mart.)  Spring</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres de  caule ereto, coletadas em margem   de igarap&eacute; no interior da  mata.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Americana. No Brasil, foi citada para o Amazonas, Bahia, Cear&aacute;, Distrito  Federal, Goi&aacute;s, Mato Grosso do Sul, Mato Grosso, Minas Gerais, Par&aacute;, Piau&iacute;, Rio  Grande do Norte, Rio de Janeiro e Roraima (Alston <i>et al., </i>1981; Hirai, 2010).  Neste trabalho, faz-se a primeira refer&ecirc;ncia para o estado do Maranh&atilde;o.</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, Povoado Altos, 01.04.2006, f&eacute;rtil, R. S. Fernandes 73  (EAC, MG); Correntinho, 27.05.2007, f&eacute;rtil, R. S. Fernandes <i>et al. </i>92 (MG, EAC).</font></p>     <p><font size="2" face="Verdana"><i>*Selaginella flagellata </i>Spring</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres de caule ereto e &aacute;pice flageliforme,  coletadas em margem de igarap&eacute; no interior da mata.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Americana. No Brasil, foi citada para o Amap&aacute;, Amazonas, Cear&aacute;, Mato Grosso,  Par&aacute;, Pernambuco e Rond&ocirc;nia (de acordo com I. A. Valdespino em sua Tese de Doutorado,  intitulada 'A monographic revision of <i>Selaginella </i>P. Beauv. subgenus <i>Heterostachys </i>Baker in Central and South America&quot;, defendida em  1995; Barros <i>et al., </i>2002; Mickel <i>et al., </i>2004). No presente  estudo, esta &eacute; a primeira refer&ecirc;ncia para o estado do Maranh&atilde;o.</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, Povoado Altos, 01.04.2006, f&eacute;rtil, R. S. Fernandes 72  (EAC, MG).</font></p>     <p><font size="2" face="Verdana">  <b>SAMAMBAIAS</b></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"><b>Blechnaceae</b></font></p>     <p><font size="2" face="Verdana"><i>Blechnum serrulatum </i>Rich.</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres,  coletadas em terreno arenoso e &uacute;mido no interior da mata ciliar, &agrave;s margens de  brejo, com poucos indiv&iacute;duos.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Pac&iacute;fica. No Brasil, foi citada para Alagoas, Amap&aacute;, Amazonas, Bahia, Distrito  Federal, Esp&iacute;rito Santo, Goi&aacute;s, Maranh&atilde;o, Mato Grosso, Mato Grosso do Sul,  Minas Gerais, Par&aacute;, Para&iacute;ba, Paran&aacute;, Pernambuco, Piau&iacute;, Rio de Janeiro, Rio  Grande do Sul, Rond&ocirc;nia, Roraima, Santa Catarina e S&atilde;o Paulo (Dittrich, 2005; Dittrich &amp;  Salino, 2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, APA do Inhamum, 15.11.2005, est&eacute;ril, R. S. Fernandes  09 (EAC, MG).</font></p>     <p><font size="2" face="Verdana">  <b>Hymenophyllaceae</b></font></p>     <p><font size="2" face="Verdana"><i>Trichomanes cristatum </i>Kaulf.</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres,  coletadas junto a troncos de arvoretas no interior da mata, formando grandes  popula&ccedil;&otilde;es em mata ciliar &uacute;mida e fechada com densa camada de h&uacute;mus.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Sul-Americana. No Brasil, foi citada para o Amap&aacute;, Amazonas, Acre, Cear&aacute;,  Distrito Federal, Esp&iacute;rito Santo, Goi&aacute;s, Maranh&atilde;o, Mato Grosso, Mato Grosso do  Sul, Minas Gerais, Par&aacute;, Paran&aacute;, Rio Grande do Sul, Rio de Janeiro, Santa  Catarina e S&atilde;o Paulo (Tryon &amp; Conant,  1975; Windisch, 1992,  2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 08.11.2005, f&eacute;rtil, R. S. Fernandes 07 (EAC); APA do Inhamum,  06.05.2006, R. S. Fernandes   28 (MG).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana">  <b>Lindsaeaceae</b></font></p>     <p><font size="2" face="Verdana"><i>*Lindsaea divaricata </i>Klotzsch</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres, crescendo sempre &agrave;s margens de  brejos, no interior da mata &uacute;mida. Foi observado um maior  n&uacute;mero de indiv&iacute;duos no per&iacute;odo chuvoso (dezembro a mar&ccedil;o).</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Americana. No Brasil j&aacute; havia sido referida para o Amazonas, Goi&aacute;s, Mato  Grosso, Par&aacute; e S&atilde;o Paulo (Costa <i>et al., </i>2006; Prado &amp; Moran, 2009). A esp&eacute;cie &eacute; referida pela primeira vez para o estado do  Maranh&atilde;o.</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA do  Inhamum, 03.11.2005, f&eacute;rtil, R. S. Fernandes &amp; G. M. Concei&ccedil;&atilde;o  02 (EAC); 15.11.2006, f&eacute;rtil, R. S. Fernandes &amp; G. M. Concei&ccedil;&atilde;o 08 (MG);  06.05.2006, f&eacute;rtil, R. S. Fernandes 24 (MG).</font></p>     <p><font size="2" face="Verdana">  <b>Lomariopsidaceae</b></font></p>     <p><font size="2" face="Verdana"><i>Nephrolepis biserrata </i>(Sw.) Schott Plantas terrestres, coletadas  tanto em mata ciliar fechada ou  aberta (degradada) como dentro de brejos, com poucos indiv&iacute;duos. Alguns indiv&iacute;duos  cresciam como ep&iacute;fitas em palmeiras de baba&ccedil;u <i>(Orbignyaphalerata </i>Mart.)  em &aacute;reas de cerrado.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Circum-Ant&aacute;rtica. No  Brasil, foi citada para Acre, Alagoas, Amap&aacute;, Amazonas, Bahia, Cear&aacute;, Esp&iacute;rito  Santo, Maranh&atilde;o, Mato Grosso, Par&aacute;, Para&iacute;ba, Paran&aacute;, Pernambuco, Rio de  Janeiro, Santa Catarina e S&atilde;o Paulo (Mori <i>et al., </i>1983;  Behar &amp;  Vi&eacute;gas, 1992;  Santos &amp;  Sylvestre, 2001;  Pietrobom &amp;  Barros, 2006;  Boldrin &amp;  Prado, 2007;  Fernandes <i>et al.</i>,  2007; Maciel <i>et al.</i>,  2007; Prado &amp;  Moran, 2009).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 15.11.2005, f&eacute;rtil, R. S. Fernandes 12 (EAC, MG).</font></p>     <p><font size="2" face="Verdana"><i>Nephrolepis rivularis </i>(Vahl)  Mett. ex Krug</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana">Plantas ep&iacute;fitas,  crescendo em palmeiras de baba&ccedil;u, coletadas apenas no per&iacute;odo chuvoso.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Americana. No Brasil, foi  citada para o Acre, Amap&aacute;, Alagoas, Amazonas, Bahia, Esp&iacute;rito Santo, Maranh&atilde;o,  Minas Gerais, Par&aacute;, Paran&aacute;, Pernambuco, Rond&ocirc;nia, Roraima, Rio de Janeiro, Santa Catarina e S&atilde;o Paulo  (Barros <i>et al., </i>2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 24.02.2006, f&eacute;rtil, R. S. Fernandes 20 (EAC, MG).</font></p>     <p><font size="2" face="Verdana">  <b>Lygodiaceae</b></font></p>     <p><font size="2" face="Verdana"><i>Lygodium venustum </i>Sw.</font></p>     <p><font size="2" face="Verdana"> Plantas de raque vol&uacute;vel, coletadas  em vegeta&ccedil;&atilde;o de mata ciliar e no  cerrado aberto.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Americana. No Brasil, foi  citada para Acre, Alagoas, Amap&aacute;, Amazonas, Cear&aacute;, Distrito Federal, Maranh&atilde;o,  Mato Grosso, Minas Gerais, Par&aacute;, Para&iacute;ba, Pernambuco, Roraima, Rond&ocirc;nia  e S&atilde;o Paulo (Brade, 1940;  Tryon &amp;  Conant, 1975;  Gra&ccedil;ano, <i>et al., </i>1998;  Bastos &amp;  Cutrim, 1999;  Windisch &amp;  Tryon, 2001;  Silva &amp;  Barros, 2005;  Pietrobom &amp;  Barros, 2006;  Prado &amp;  Moran,   2009; Barros <i>et  al., </i>2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 15.11.2005, f&eacute;rtil, R. S. Fernandes 11 (EAC, MG).</font></p>     <p><font size="2" face="Verdana"><i>Lygodium volubile </i>Sw.</font></p>     <p><font size="2" face="Verdana"> Plantas de raque vol&uacute;vel, coletadas em vegeta&ccedil;&atilde;o de  mata ciliar em ambientes sombreados &agrave;s margens de brejos.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Americana. No Brasil, foi  citada para Acre, Alagoas, Amap&aacute;, Amazonas, Bahia, Cear&aacute;, Distrito Federal,  Esp&iacute;rito Santo, Maranh&atilde;o, Mato Grosso, Minas Gerais, Par&aacute;, Para&iacute;ba, Paran&aacute;,  Pernambuco, Rio de Janeiro, Rio Grande do Sul, Rond&ocirc;nia, Roraima, Santa  Catarina e S&atilde;o Paulo (Angely, 1963; Tryon &amp; Conant, 1975; Mori <i>et al., </i>1983; Behar &amp; Vi&eacute;gas, 1992; Gra&ccedil;ano <i>et al., </i>1998;  Bastos &amp;  Cutrim, 1999;  Salino &amp;  Joly, 2001;  Mynssen &amp;  W&iacute;ndisch, 2004;  Pietrobom &amp;  Barros, 2006;  Prado &amp;  Moran, 2009).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias,  Brejinho, margem da BR 316, 02.11.2006, f&eacute;rtil, R. S. Fernandes 42 (EAC); Engenho D'&aacute;gua, 13.01.2007,  f&eacute;rtil,   R. S. Fernandes 45 (MG).</font></p>     <p><font size="2" face="Verdana">  <b>Polypodiaceae</b></font></p>     <p><font size="2" face="Verdana"><i>Phlebodium aureum </i>L.</font></p>     <p><font size="2" face="Verdana"> Plantas ep&iacute;fitas em palmeira de baba&ccedil;u, coletadas  apenas no per&iacute;odo chuvoso.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Americana. No Brasil, foi  citada para o Alagoas, Bahia, Cear&aacute;, Distrito Federal, Goi&aacute;s, Maranh&atilde;o, Mato  Grosso, Par&aacute;, Para&iacute;ba, Pernambuco, Rio de Janeiro, Roraima e S&atilde;o Paulo  (Sampaio, 1930; Tryon &amp; Conant, 1975; Santos &amp; Barros, 1999; Fernandes <i>et  al., </i>2007; Labiak  &amp; Hirai, 2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 03.02.2006, f&eacute;rtil, R. S. Fernandes 15 (EAC,   MG); 06.05.2006, R. S. Fernandes 25 (MG); Povoado  Altos, 01.04.2007, est&eacute;ril, R. S. Fernandes 76 (MG).</font></p>     <p><font size="2" face="Verdana">  <b>Pteridaceae</b></font></p>     <p><font size="2" face="Verdana"><i>*Acrostichum  danaeifolium </i>Langsd. &amp; Fisch.</font></p>     <p><font size="2" face="Verdana">Plantas terrestres, coletadas &agrave;s margens de brejos  em local aberto exposto ao sol e ao longo de extensas &aacute;reas de buritizais,  sendo poucos indiv&iacute;duos observados.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Americana. No Brasil, j&aacute; havia sido citada para Alagoas, Amazonas, Bahia,  Cear&aacute;, Esp&iacute;rito Santo, Goi&aacute;s, Mato Grosso, Minas Gerais, Par&aacute;, Para&iacute;ba, Paran&aacute;,  Pernambuco, Rio Grande do Sul, Rio de Janeiro, Santa Catarina e S&atilde;o Paulo (Sehnem,  1972; Prado, 2010). Neste trabalho, faz-se a primeira refer&ecirc;ncia para o estado  do Maranh&atilde;o.</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, localidade Junco, 12.08.2007, est&eacute;ril, R. S.  Fernandes 98   (EAC, MG).</font></p>     <p><font size="2" face="Verdana">  <i>Adiantum deflectens </i>Mart.</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres,  coletadas em barrancos &agrave;s margens de trilhas no interior de matas secund&aacute;rias,  ocorrendo associadas com bri&oacute;fitas, e s&oacute; sendo observada em  per&iacute;odos chuvosos.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Americana. No Brasil, foi citada para o Alagoas, Amazonas, Amap&aacute;, Bahia, Cear&aacute;,  Distrito Federal, Esp&iacute;rito Santo, Goi&aacute;s, Maranh&atilde;o, Mato Grosso, Minas Gerais,  Par&aacute;, Paran&aacute;, Para&iacute;ba, Pernambuco, Piau&iacute;, Rio de Janeiro, Rio Grande do Norte,  Rond&ocirc;nia, Santa Catarina, S&atilde;o Paulo e Tocantins (Prado, 2005a, 2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, APA do Inhamum, 03.02.2006, f&eacute;rtil, R. S. Fernandes  16 (EAC, MG).</font></p>     <p><font size="2" face="Verdana"><i>*Adiantum serratodentatum </i>Humb. &amp; Bonpl. ex Willd.</font></p>     <p><font size="2" face="Verdana">Plantas  terrestres, coletadas &agrave;s margens de trilhas em locais abertos pr&oacute;ximos a  brejos.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Americana. No Brasil, foi citada para o Acre, Amap&aacute;, Amazonas, Bahia, Goi&aacute;s,  Mato Grosso, Mato Grosso do Sul, Minas Gerais, Par&aacute;, Pernambuco, Rio de  Janeiro, Roraima, Santa Catarina e S&atilde;o Paulo (Tryon  &amp; Conant, 1975;  Melo &amp; Salino, 2002; Peres <i>et al., </i>2004; Athayde Filho  &amp; Agostinho, 2005; Pietrobom &amp; Barros, 2006; Santos &amp; Sylvestre,  2006; Winter <i>et al., </i>2007; N&oacute;brega &amp; Prado, 2008; Prado,  2010). Neste invent&aacute;rio, a esp&eacute;cie &eacute; referida pela primeira vez para a o estado  do Maranh&atilde;o.</font></p>     <p><font size="2" face="Verdana"> Material  examinado: Brasil, Maranh&atilde;o: Caxias, Brejinho, margem da BR 316, 02.11.2006,  est&eacute;ril, R. S. Fernandes 43 (EAC); 04.03.2007, f&eacute;rtil, R. S. Fernandes 59 (MG).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana">  <i>Ceratopteris thalictroides </i>(L.) Brongn.</font></p>     <p><font size="2" face="Verdana">Planta  terrestre, coletada em ambientes periodicamente alagados, pr&oacute;ximos a  buritizais. Representada por apenas um indiv&iacute;duo observado.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Circum-Ant&aacute;rtica. No Brasil, foi citada para o Cear&aacute;, Goi&aacute;s, Maranh&atilde;o, Mato Grosso,  Mato Grosso do Sul, Par&aacute;, Pernambuco, Rio de Janeiro e S&atilde;o Paulo (Tryon &amp;  Conant, 1975; Barros <i>et al., </i>2002;   Sehnem, 1979; Prado,  2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, Brejinho, margem da BR 316, 02.11.2006, f&eacute;rtil, R. S.  Fernandes 38 (EAC).</font></p>     <p><font size="2" face="Verdana">  <i>Pityrogramma calomelanos </i>(L.) Link var. <i>calomelanos</i></font></p>     <p><font size="2" face="Verdana">Plantas terrestres,  coletadas em ambientes diferentes, tanto em terrenos arenosos e secos como  dentro de brejos, onde cresciam junto a troncos de &aacute;rvores. Representadas sempre  por poucos indiv&iacute;duos.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Circum-Ant&aacute;rtica. No Brasil, foi citada para Acre, Alagoas, Amap&aacute;, Amazonas,  Bahia, Cear&aacute;, Distrito Federal, Esp&iacute;rito Santo, Goi&aacute;s, Maranh&atilde;o, Mato Grosso,  Mato Grosso do Sul, Minas Gerais, Par&aacute;, Para&iacute;ba, Paran&aacute;, Pernambuco, Piau&iacute;, Rio  de Janeiro, Rio Grande do Norte, Rio Grande do Sul, Rond&ocirc;nia, Roraima, Santa  Catarina e S&atilde;o Paulo (Tryon &amp; Conant, 1975; Windisch  &amp; Tryon,  2001; Prado, 2005b; Pietrobom &amp; Barros, 2006; Fernandes <i>et al., </i>2007;   Boldrin &amp; Prado,  2007).</font></p>     <p><font size="2" face="Verdana"> Material examinado:  Brasil, Maranh&atilde;o: Caxias, APA do Inhamum, 15.11.2005, f&eacute;rtil, R. S. Fernandes  10 (EAC); 03.02.2006, est&eacute;ril, R. S. Fernandes 18 (MG).</font></p>     <p><font size="2" face="Verdana">  <b>Salviniaceae</b></font></p>     <p><font size="2" face="Verdana"><i>*Salvinia auriculata </i>Aubl.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Plantas aqu&aacute;ticas  flutuantes, coletadas em ambientes lamosos de brejos de &aacute;guas rasas, cobertos  por &aacute;rvores. Representadas por poucos indiv&iacute;duos.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica:  Americana. No Brasil, foi citada para o Amazonas, Bahia, Cear&aacute;, Distrito  Federal, Esp&iacute;rito Santo, Mato Grosso, Minas Gerais, Par&aacute;, Paran&aacute;, Para&iacute;ba, Pernambuco, Rio Grande do Norte, Rio de  Janeiro, Rio Grande do Sul, Santa Catarina, S&atilde;o Paulo e Sergipe (Braga, 1951;  Tryon &amp;  Conant, 1975;  Windisch, 1975;  Behar &amp;  Vi&eacute;gas, 1992;  Santos &amp;  Sylvestre, 2001;  Barros <i>et al., </i>2002;  Figueiredo &amp;  Salino, 2005;  Costa <i>et al., </i>2006;  Prado, 2006).  No presente estudo, esta &eacute; a  primeira refer&ecirc;ncia para o estado do Maranh&atilde;o.</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias,  Junco, 12.08.2007, est&eacute;ril, R. S. Fernandes 97 (EAC, MG).</font></p>     <p><font size="2" face="Verdana">  <b>Thelypteridaceae</b></font></p>     <p><font size="2" face="Verdana"><i>Thelypteris interrupta </i>(Willd.) K. Iwats.</font></p>     <p><font size="2" face="Verdana">Plantas terrestres, coletadas tanto em terreno arenoso  &uacute;mido, no interior da mata  ciliar, como &agrave;s margens de brejos alagados expostos ao sol.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Circum-ant&aacute;rtica. No  Brasil, foi citada para Alagoas, Amap&aacute;, Amazonas, Bahia, Cear&aacute;, Esp&iacute;rito Santo,  Goi&aacute;s, Maranh&atilde;o, Mato Grosso, Mato Grosso do Sul, Minas Gerais, Par&aacute;, Para&iacute;ba,  Paran&aacute;, Pernambuco, Rio de Janeiro, Rio Grande do Sul, Santa Catarina, S&atilde;o  Paulo e Tocantins (Pietrobom &amp; Barros, 2006; Salino &amp; Almeida, 2010).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 24.06.2006, est&eacute;ril, R. S. Fernandes 32 (EAC); Balne&aacute;rio Maria do Ros&aacute;rio, 07.07.2007,  f&eacute;rtil, R.   S. Fernandes &amp; A. Alves 94 (MG).</font></p>     <p><font size="2" face="Verdana">  <i>Thelypteris patens </i>(Sw.) Small.</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres coletadas no interior da mata  ciliar, pr&oacute;ximo a brejos, com grande n&uacute;mero de indiv&iacute;duos.</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Americana. No Brasil, foi  citada para o Acre, Alagoas, Cear&aacute;, Esp&iacute;rito Santo, Goi&aacute;s, Maranh&atilde;o, Mato  Grosso, Mato Grosso do Sul, Minas Gerais, Paran&aacute;, Pernambuco, Rio de Janeiro,  Rio Grande do Sul, Santa Catarina e S&atilde;o Paulo (Salino &amp; Semir, 2002;  Fernandes <i>et al., </i>2007).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 15.11.2005, f&eacute;rtil, R. S. Fernandes &amp; F Limeira-de-Oliveira  14 (EAC, MG); 06.05.2006,  f&eacute;rtil, R.   S. Fernandes 31 (MG).</font></p>     <p><font size="2" face="Verdana">  <i>helypteris salzmanni </i>(F&eacute;e) C.V. Morton</font></p>     <p><font size="2" face="Verdana">Plantas terrestres, coletadas sempre &agrave;s margens de brejos no interior da mata,  tanto no per&iacute;odo seco como no per&iacute;odo chuvoso, formando, frequentemente,  grandes popula&ccedil;&otilde;es.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Sul-Americana. No Brasil,  foi citada para a Bahia, Distrito Federal, Esp&iacute;rito Santo, Goi&aacute;s, Maranh&atilde;o,  Mato Grosso, Mato Grosso do Sul, Minas Gerais, Paran&aacute;, Rio de Janeiro, Roraima  e S&atilde;o Paulo (Salino &amp; Semir, 2004).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias, APA  do Inhamum, 08.11.2005, f&eacute;rtil, R. S. Fernandes 06   (EAC, MG).</font></p>     <p><font size="2" face="Verdana">  <i>Thelypteris serrata </i>(Cav.) Alston</font></p>     <p><font size="2" face="Verdana"> Plantas terrestres, coletadas em ambientes alagados  e paludosos &agrave;s margens de brejos, associados a buritizais.</font></p>     <p><font size="2" face="Verdana"> Distribui&ccedil;&atilde;o geogr&aacute;fica: Americana. No Brasil, foi  citada para o Amap&aacute;, Amazonas, Bahia, Cear&aacute;, Esp&iacute;rito Santo, Goi&aacute;s, Maranh&atilde;o,  Mato Grosso, Mato Grosso do Sul, Minas Gerais, Par&aacute;, Para&iacute;ba, Paran&aacute;,  Pernambuco, Rio de Janeiro, Rio Grande do Sul, Santa Catarina e S&atilde;o Paulo  (Dutra, 1938; Salino &amp; Semir, 2004; Pietrobom &amp; Barros, 2006).</font></p>     <p><font size="2" face="Verdana"> Material examinado: Brasil, Maranh&atilde;o: Caxias,   Brejinho, margem da BR 316, 02.11.2006, f&eacute;rtil, R.  S. Fernandes 37 (EAC, MG).</font></p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font size="3" face="Verdana"><b>CONCLUS&Atilde;O</b></font></p>     <p><font size="2" face="Verdana"> A &Aacute;rea de Prote&ccedil;&atilde;o Ambiental Inhamum possui mais da  metade das esp&eacute;cies registradas em Caxias (13 esp&eacute;cies), o que demonstra a  import&acirc;ncia desta &aacute;rea para a preserva&ccedil;&atilde;o da flora de plantas vasculares sem  sementes do munic&iacute;pio. O registro de novas ocorr&ecirc;ncias para o Maranh&atilde;o &eacute;  reflexo do n&uacute;mero incipiente de estudos que enfatizem a flora de plantas  vasculares sem sementes do oeste nordestino, devendo-se, assim, incentivar a  realiza&ccedil;&atilde;o de mais coletas nessa regi&atilde;o.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana"><b>AGRADECIMENTOS</b></font></p>     <p><font size="2" face="Verdana"> Os autores agradecem &agrave; Funda&ccedil;&atilde;o de Amparo &agrave;  Pesquisa e ao Desenvolvimento Tecnol&oacute;gico do Maranh&atilde;o (FAPEMA), ao Centro de Estudos  Superiores de Caxias/Universidade Estadual do Maranh&atilde;o (CESC/UEMA) e &agrave;  Universidade Federal do Cear&aacute; (UFC), pelo apoio e disponibilidade dos recursos  necess&aacute;rios para a realiza&ccedil;&atilde;o do presente trabalho.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana"> <b>REFER&Ecirc;NCIAS</b></font></p>     <!-- ref --><p><font size="2" face="Verdana"> ALSTON, A. H. G., A. C. JERMY &amp; J. M. RANKIN,  1981. The genus <i>Selaginella </i>in tropical South   America. <b>Bulletin of the British Museum  (Natural History) Botany </b>9(4): 233-330.</font><!-- ref --><p><font size="2" face="Verdana"> ANDRADE-LIMA, D., 1969. Pterid&oacute;fitas que ocorrem nas floras Extra-Amaz&ocirc;nica  e Amaz&ocirc;nica do Brasil e proximidades. <b>Anais do Congresso Nacional de  Bot&acirc;nica </b>20: 34-39.</font><!-- ref --><p><font size="2" face="Verdana"> ANGELY J., 1963. Flora  Pteridophyta do Paran&aacute;. <b>Instituto Paranaensede Bot&acirc;nica </b>23: 1-48.</font><!-- ref --><p><font size="2" face="Verdana"> ATHAYDE FILHO, F. P. &amp; A. A.  AGOSTINHO, 2005. Pteridoflora de  duas veredas no munic&iacute;pio de Campin&aacute;polis, Mato Grosso, Brasil. <b>Pesquisas  Bot&acirc;nicas </b>56: 145-160.</font><!-- ref --><p><font size="2" face="Verdana"> BAKER, J. G., 1870.  Cyatheaceae <i>et </i>Polypodiaceae. In: C. F. P. MARTIUS &amp; A. G. 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HOPKINS, R.  SECCO, T. B. CAVALCANTI &amp; V. C. SOUZA (Orgs.): <b>Cat&aacute;logo de plantas e fungos do  Brasil: </b>1: 543-545. Instituto de Pesquisas Jardim Bot&acirc;nico do Rio de  Janeiro, Rio de Janeiro.</font><!-- ref --><p><font size="2" face="Verdana"> WINDISCH, P. G. &amp; R. M. TRYON, 2001. The Serra Ricardo Franco (State of Mato Grosso, Brazil)  as probable migration route and its present  fern flora. <b>Bradea </b>8(39):  267-276.</font><!-- ref --><p><font size="2" face="Verdana"> WINTER, S.  L. S., C. M. MYNSSEN &amp; J. PRADO, 2007. <i>Adiantum </i>(Pteridaceae) no arboreto do Jardim Bot&acirc;nico do Rio de Janeiro, Brasil. <b>Rodrigu&eacute;sia </b>58(4): 847-858.</font><!-- ref --><p><font size="2" face="Verdana"> XAVIER, S. R. S., 2007. <b>Pterid&oacute;fitas da Caatinga: </b>Lista anotada,  an&aacute;lise da composi&ccedil;&atilde;o flor&iacute;stica e padr&otilde;es de distribui&ccedil;&atilde;o geogr&aacute;fica: 1  - 147. Tese (Doutorado em  Bot&acirc;nica) - Universidade  Federal Rural de Pernambuco, Recife. Dispon&iacute;vel em: &lt;<a href="http://www.pgb.ufrpe.br/doctos/Tese_Sergio_Romero_da_Silva_Xavier.pdf" target="_blank">http://www.pgb.uffrpe.br/doctos/lese_Sergio_Romero_da_Silva_Xavier.pdf</a>&gt;. Acesso em: 19 dezembro 2010.</font><p>&nbsp;</p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana"><b><a name="endereco"></a><a href="#topo"><img src="img/revistas/bmpegcn/v5n3/seta.gif" border="0" /></a></b></font><font size="2" face="verdana"><b>Endere&ccedil;o para correspond&ecirc;ncia:</b>    <br> Museu  Paraense Em&iacute;lio Goeldi    <br> Editor  do Boletim do Museu Paraense Em&iacute;lio Goeldi. Ci&ecirc;ncias Naturais    <br> Av.  Magalh&atilde;es Barata, 376    <br> S&atilde;o  Braz &ndash; CEP 66040-170    <br> Bel&eacute;m  - PA - Brasil    <br> Caixa  Postal 399    <br> Telefone:  55-91-3182-3246    ]]></body>
<body><![CDATA[<br> Fax:  55-91-3249-6373    <br> E-mail: <a href="mailto:boletim.naturais@museu-goeldi.br">boletim.naturais@museu-goeldi.br</a></font></p>     <p><font size="2" face="Verdana">Recebido: 25/08/2009    <br> Aprovado: 17/12/2010</font></p>     <p><font size="2" face="Verdana">Responsabilidade editorial: Anna Luiza Ilkiu-Borges</font></p>      ]]></body><back>
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