Difference between revisions of "Thelypteris augescens"
Amer. Fern J. 12: 75. 1922.
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|common_names=Abrupt-tipped maiden fern | |common_names=Abrupt-tipped maiden fern | ||
| − | |basionyms={{Treatment/ID/ | + | |basionyms={{Treatment/ID/Basionym |
|name=Aspidium augescens | |name=Aspidium augescens | ||
|authority=Link | |authority=Link | ||
| + | |publication_title=Fil. Spec., | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse_grained_fna_xml/V2/V2_125.xml |
|genus=Thelypteris | |genus=Thelypteris | ||
|subgenus=Thelypteris subg. Cyclosorus | |subgenus=Thelypteris subg. Cyclosorus | ||
Revision as of 18:55, 24 September 2019
Stems creeping, 4–8 mm diam. Leaves monomorphic, evergreen, (0.5–)1–3.5 cm apart, (30–)65–140 cm. Petiole straw-colored, 15–70 cm × 2–7(–9) mm, at base with scales tan to brownish, linear-lanceolate, hairy at margin. Blade 30–70 cm, broadest at or near base, abruptly narrowed distally, apical pinna ± similar to lateral pinnae, 5–17 × 1–3(–5) cm. Pinnae (4–)10–22(–28) × (0.3–)0.7–1.5 cm, incised 1/2–3/4 of width; segments somewhat curved, margins revolute, those at base of proximal pinnae slightly elongate; proximal pair of veins from adjacent segments running to sinus. Indument abaxially of hairs 0.2–0.4 mm on costae, veins, and blade tissue, also of brownish scales 0.6–1.2 mm on costae; veins and blade tissue glabrous adaxially. Sori round, medial to supramedial; indusia tan, bearing hairs 0.2–0.4 mm; sporangia glabrous. 2n = 144.
Habitat: Limestone banks, in sun or partial shade
Elevation: 0–50 m
Distribution
Fla., s Mexico, West Indies in the Bahamas, Cuba, Central America in Guatemala.
Discussion
Thelypteris augescens occasionally hybridizes with T. kunthii and T. ovata var. ovata in southern Florida.
Selected References
None.