familyThelypteridaceae
genusThelypteris
subgenusThelypteris subg. Goniopteris
speciesThelypteris tetragona
Difference between revisions of "Thelypteris tetragona"
Ferns S. E. States 256. 1938.
Common names: Free-tip star-hair fern
Basionym: Polypodium tetragonum Swartz
Synonyms: Dryopteris tetragona (Swartz) UrbanGoniopteris tetragona (Swartz) C. Presl
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| − | --><span class="statement" id="st- | + | --><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><!-- |
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna- | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/9216fc802291cd3df363fd52122300479582ede7/coarse_grained_fna_xml/V2/V2_395.xml |
|genus=Thelypteris | |genus=Thelypteris | ||
|subgenus=Thelypteris subg. Goniopteris | |subgenus=Thelypteris subg. Goniopteris | ||
|species=Thelypteris tetragona | |species=Thelypteris tetragona | ||
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Revision as of 14:19, 27 July 2019
Stems short-creeping, 3–5 mm diam. Leaves somewhat dimorphic, evergreen, somewhat spaced, fertile leaves long-petioled, more erect, and with more contracted pinnae, to ca. 1.1 m. Petiole straw-colored, to 60 cm × 2–5 mm, at base sparsely set with brown, lanceolate, stellate-hairy scales. Blade 30–45(–55) × 15–25 cm, broadest at base, with apical pinna similar to lateral pinnae. Pinnae 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. Indument abaxially of mostly needlelike hairs 0.1–0.3 mm on costae and veins, blade tissue glabrous on both sides. Sori round, medial to supramedial; indusia lacking; sporangia with numerous hairs 0.1 mm. 2n = 144.
Habitat: Damp woods
Elevation: 0–50 m
Distribution
Fla., Mexico, West Indies in the Antilles, Central America to Panama, n South America.
Discussion
Selected References
None.
Lower Taxa
None.