Difference between revisions of "Thelypteris augescens"

Revision as of 18:55, 24 September 2019

Copyright: Flora of North America Association

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

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