View source for Trichomanes petersii

{{Treatment/ID
|accepted_name=Trichomanes petersii
|accepted_authority=A. Gray
|publications={{Treatment/Publication
|title=Amer. J. Sci. Arts
|place=ser. 2, 15: 326. 1853
|year=1853
}}
|common_names=Dwarf bristle fern;Peters's bristle fern
|special_status={{Treatment/ID/Special_status
|code=F
|label=Illustrated
}}
|basionyms=
|synonyms={{Treatment/ID/Synonym
|name=Didymoglossum petersii
|authority=(A. Gray) Copeland
|rank=species
}}
|hierarchy=Hymenophyllaceae;Trichomanes;Trichomanes petersii
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Hymenophyllaceae]]</div><div class="higher-taxon"><small>genus</small>[[Trichomanes]]</div><div class="higher-taxon"><small>species</small>[[Trichomanes petersii]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-d0_s0" data-properties="whole_organism growth form"><b>Plants </b>on rock or epiphytic.</span> <span class="statement" id="st-d0_s1" data-properties="stem growth form or orientation;stem shape;leaf arrangement;hair coloration;glandular-hair quantity;glandular-hair architecture;glandular-hair shape;glandular-hair shape;hair quantity;hair architecture;hair shape;hair shape"><b>Stems </b>long-creeping, threadlike, and intertwining, bearing scattered leaves, covered with dark hairs of 2 types, 2-celled glandular-hairs and elongate rhizoidlike hairs;</span> <span class="statement" id="st-d0_s2" data-properties="root presence">roots absent.</span> <span class="statement" id="st-d0_s3" data-properties="leaf shape;leaf architecture;leaf length;leaf width;leaf architecture or shape;hair architecture;hair architecture or shape;hair coloration;glandular-hair architecture"><b>Leaves </b>elliptic to oblanceolate, simple, 0.5–2 cm × 2–5 mm, ± entire, bearing simple or 2-cleft dark hairs on margin and 2-celled glandular-hairs on petioles and veins;</span> <span class="statement" id="st-d0_s4" data-properties="">petioles nearly as long as blades.</span> <span class="statement" id="st-d0_s5" data-properties="petiole architecture or shape;false vein quantity;false vein fusion"><b>Venation </b>weakly pinnate with numerous unconnected false veins.</span> <span class="statement" id="st-d0_s6" data-properties="soral involucre quantity;soral involucre position or structure subtype;soral involucre shape;soral involucre shape"><b>Soral </b>involucres usually 1 per leaf, terminal on blades, short-conic, flaring widely at mouth;</span> <span class="statement" id="st-d0_s7" data-properties="involucre lip architecture">involucre lips not dark-edged.</span> <span class="statement" id="st-d0_s8" data-properties="filament architecture"><b>Gametophytes </b>composed entirely of branched filaments.</span> <span class="statement" id="st-d0_s9" data-properties="filament height or length or size;cell prominence;cell height or length or size"><b>Gemmae </b>composed of short filaments of undifferentiated cells.</span> <span class="statement" id="st-d0_s10" data-properties="2n chromosome quantity">2n = ca. 102.</span><!--

-->{{Treatment/Body
|habitat=On tree trunks and noncalcareous rocks in deep narrow gorges
|elevation=0–500 m
|distribution=Ala.;Ark.;Fla.;Ga.;La.;Miss.;N.C.;S.C.;Tenn.;Mexico;Central America in Guatemala
|discussion=<p>Trichomanes petersii has irregular meiosis and generally misshapen spores, but it produces some large and viable spores, presumably unreduced in chromosome number. Gametophytes, identified as this taxon by enzyme electrophoresis, have been observed to produce apogamous sporophytes. Therefore, the species seems capable of some reproduction by an apogamous life cycle. Sporophytes also reproduce vegetatively by dispersible buds formed on the leaves. Although some gametophytes in the vicinity of sporophytes have been shown to be Trichomanes petersii, most of the independent Trichomanes gametophyte populations of the eastern United States are T. intricatum.</p><!--
--><p>Sporophytes of Trichomanes petersii and other species of subg. Didymoglossum form dense mats of imbricated leaves, often excluding all other vegetation. In this habit, as well as in their reduced size and absence of roots, they have adopted a growth form mimicking and successfully competing with bryophytes. In Louisiana and Mississippi, T. petersii occurs on trunks of Fagus and Magnolia. Elsewhere it is on noncalcareous rocks, but in Florida, T. petersii also occurs on chert boulders in limestone sinks and cliffs.</p>
|tables=
|references=
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-->{{#Taxon:
name=Trichomanes petersii
|authority=A. Gray
|rank=species
|parent rank=genus
|synonyms=Didymoglossum petersii
|basionyms=
|family=Hymenophyllaceae
|habitat=On tree trunks and noncalcareous rocks in deep narrow gorges
|elevation=0–500 m
|distribution=Ala.;Ark.;Fla.;Ga.;La.;Miss.;N.C.;S.C.;Tenn.;Mexico;Central America in Guatemala
|reference=None
|publication title=Amer. J. Sci. Arts
|publication year=1853
|special status=Illustrated
|source xml=https://bibilujan@bitbucket.org/aafc-mbb/fna-fine-grained-xml.git/src/84153f6d59a0a91d69695978a64cee7560374f8e/V2/V2_357.xml
|genus=Trichomanes
|species=Trichomanes petersii
|2n chromosome quantity=102
|cell height or length or size=short
|cell prominence=undifferentiated
|false vein fusion=unconnected
|false vein quantity=numerous
|filament architecture=branched
|filament height or length or size=short
|glandular-hair architecture=2-celled;2-celled
|glandular-hair quantity=2
|glandular-hair shape=rhizoid-like;elongate
|hair architecture=simple;2-celled
|hair architecture or shape=2-cleft
|hair coloration=dark;dark
|hair quantity=2
|hair shape=rhizoid-like;elongate
|involucre lip architecture=not dark-edged
|leaf architecture=simple
|leaf architecture or shape=entire
|leaf arrangement=scattered
|leaf length=0.5cm;2cm
|leaf shape=elliptic;oblanceolate
|leaf width=2mm;5mm
|petiole architecture or shape=pinnate
|root presence=absent
|soral involucre position or structure subtype=terminal
|soral involucre quantity=1
|soral involucre shape=flaring;short-conic
|stem growth form or orientation=long-creeping
|stem shape=thread-like
|whole_organism growth form=plant
}}<!--

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