View source for Thelypteris tetragona

{{Treatment/ID
|accepted_name=Thelypteris tetragona
|accepted_authority=(Swartz) Small
|publications={{Treatment/Publication
|title=Ferns S. E. States
|place=256. 1938
|year=1938
}}
|common_names=Free-tip star-hair fern
|basionyms={{Treatment/ID/Basionym
|name=Polypodium tetragonum
|authority=Swartz
|rank=species
|publication_title=Prodr.,
|publication_place=132. 1788
}}
|synonyms={{Treatment/ID/Synonym
|name=Dryopteris tetragona
|authority=(Swartz) Urban
|rank=species
}} {{Treatment/ID/Synonym
|name=Goniopteris tetragona
|authority=(Swartz) C. Presl
|rank=species
}}
|hierarchy=Thelypteridaceae;Thelypteris;Thelypteris subg. Goniopteris;Thelypteris tetragona
|hierarchy_nav=<div class="higher-taxa"><div class="higher-taxon"><small>family</small>[[Thelypteridaceae]]</div><div class="higher-taxon"><small>genus</small>[[Thelypteris]]</div><div class="higher-taxon"><small>subgenus</small>[[Thelypteris subg. Goniopteris]]</div><div class="higher-taxon"><small>species</small>[[Thelypteris tetragona]]</div></div>
|volume=Volume 2
|mention_page=
|treatment_page=
}}<!--

--><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>short-creeping, 3–5 mm diam. <b>Leaves</b> somewhat dimorphic, evergreen, somewhat spaced, fertile leaves long-petioled, more erect, and with more contracted pinnae, to ca. 1.1 m. <b>Petiole</b> straw-colored, to 60 cm × 2–5 mm, at base sparsely set with brown, lanceolate, stellate-hairy scales. <b>Blade</b> 30–45(–55) × 15–25 cm, broadest at base, with apical pinna similar to lateral pinnae. <b>Pinnae</b> 6–8(–12) pairs, 7–15(–18) × 2–3 cm (fertile 1–2 cm), incised 1/2–3/4 of width; segments 3–5 mm wide, rounded at apex; veins 6–10 pairs, proximal pair from adjacent segments united at obtuse angle below sinus with excurrent vein ca. 0.5–1 mm to sinus. <b>Indument</b> abaxially of mostly needlelike hairs 0.1–0.3 mm on costae and veins, blade tissue glabrous on both sides. <b>Sori</b> round, medial to supramedial; indusia lacking; sporangia with numerous hairs 0.1 mm. <b>2n</b> = 144.</span><!--

-->{{Treatment/Body
|habitat=Damp woods
|elevation=0–50 m
|distribution=Fla.;Mexico;West Indies in the Antilles;Central America to Panama;n South America.
|tables=
|references=
}}<!--

--><!--

-->{{#Taxon:
name=Thelypteris tetragona
|authority=(Swartz) Small
|rank=species
|parent rank=subgenus
|synonyms=Dryopteris tetragona;Goniopteris tetragona
|basionyms=Polypodium tetragonum
|family=Thelypteridaceae
|habitat=Damp woods
|elevation=0–50 m
|distribution=Fla.;Mexico;West Indies in the Antilles;Central America to Panama;n South America.
|reference=None
|publication title=Ferns S. E. States
|publication year=1938
|special status=
|source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f50eec43f223ca0e34566be0b046453a0960e173/coarse_grained_fna_xml/V2/V2_395.xml
|genus=Thelypteris
|subgenus=Thelypteris subg. Goniopteris
|species=Thelypteris tetragona
}}<!--

-->[[Category:Treatment]][[Category:Thelypteris subg. Goniopteris]]