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 | ||
| + | |special_status={{Treatment/ID/Special_status | ||
| + | |code=F | ||
| + | |label=Illustrated | ||
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|basionyms={{Treatment/ID/Basionym | |basionyms={{Treatment/ID/Basionym | ||
|name=Aspidium augescens | |name=Aspidium augescens | ||
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|publication title=Amer. Fern J. | |publication title=Amer. Fern J. | ||
|publication year=1922 | |publication year=1922 | ||
| − | |special status= | + | |special status=Illustrated |
| − | |source xml=https:// | + | |source xml=https://bitbucket.org/aafc-mbb/fna-data-curation/src/2e0870ddd59836b60bcf96646a41e87ea5a5943a/coarse_grained_fna_xml/V2/V2_125.xml |
|genus=Thelypteris | |genus=Thelypteris | ||
|subgenus=Thelypteris subg. Cyclosorus | |subgenus=Thelypteris subg. Cyclosorus | ||
Latest revision as of 20:21, 5 November 2020
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.