familyThelypteridaceae
genusThelypteris
subgenusThelypteris subg. Cyclosorus
speciesThelypteris augescens
Difference between revisions of "Thelypteris augescens"
Amer. Fern J. 12: 75. 1922.
Common names: Abrupt-tipped maiden fern
Basionym: Aspidium augescens Link
Synonyms: Christella augescens (Link) Pichi-SermolliDryopteris augescens (Link) C. Christensen
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Stems </b>creeping, 4–8 mm diam. <b>Leaves</b> monomorphic, evergreen, (0.5–)1–3.5 cm apart, (30–)65–140 cm. <b>Petiole</b> straw-colored, 15–70 cm × 2–7(–9) mm, at base with scales tan to brownish, linear-lanceolate, hairy at margin. <b>Blade</b> 30–70 cm, broadest at or near base, abruptly narrowed distally, apical pinna ± similar to lateral pinnae, 5–17 × 1–3(–5) cm. <b>Pinnae</b> (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. <b>Indument</b> 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. <b>Sori</b> round, medial to supramedial; indusia tan, bearing hairs 0.2–0.4 mm; sporangia glabrous. <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_125.xml |
|genus=Thelypteris | |genus=Thelypteris | ||
|subgenus=Thelypteris subg. Cyclosorus | |subgenus=Thelypteris subg. Cyclosorus | ||
|species=Thelypteris augescens | |species=Thelypteris augescens | ||
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Revision as of 13:11, 27 July 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.
Lower Taxa
None.