Thelypteris augescens

(Link) Munz & I. M. Johnston

Amer. Fern J. 12: 75. 1922.

Common names: Abrupt-tipped maiden fern
Basionym: Aspidium augescens Link Fil. Spec., 103. 1841
Synonyms: Christella augescens (Link) Pichi-Sermolli Dryopteris augescens (Link) C. Christensen
Treatment appears in FNA Volume 2.

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


V2 125-distribution-map.gif

Fla., s Mexico, West Indies in the Bahamas, Cuba, Central America in Guatemala.


Thelypteris augescens occasionally hybridizes with T. kunthii and T. ovata var. ovata in southern Florida.

Selected References


Lower Taxa

... more about "Thelypteris augescens"
Alan R. Smith +
(Link) Munz & I. M. Johnston +
Aspidium augescens +
Abrupt-tipped maiden fern +
Fla. +, s Mexico +, West Indies in the Bahamas +, Cuba +  and Central America in Guatemala. +
0–50 m +
Limestone banks, in sun or partial shade +
Amer. Fern J. +
Illustrated +
Christella augescens +  and Dryopteris augescens +
Thelypteris augescens +
Thelypteris subg. Cyclosorus +
species +