Thelypteris kunthii |
Thelypteris sclerophylla |
|
---|---|---|
Kunth's maiden fern, southern shield fern, widespread maiden fern |
stiff maiden fern, stiff star-hair fern |
|
Stems | short- to long-creeping, 4–8 mm diam. |
short-creeping to suberect, 5–8 mm diam. |
Leaves | monomorphic, evergreen, up to 2(–3) cm apart, (15–)50–160 cm. |
monomorphic, evergreen, clustered, 20–55(–80) cm. |
Petiole | straw-colored, (5–)20–80 × (1–)3–6 mm, at base with brown, linear-lanceolate, hairy scales. |
straw-colored, 5–18(–25) cm × 1–3 mm, at base with brown, lanceolate, stellate-hairy scales. |
Blade | (9–)30–80 cm, broadest at base, gradually tapered to pinnatifid apex. |
15–40(–55) × 5–10 cm, proximal 2–5(–10) pairs of pinnae gradually reduced, blade gradually narrowed distally to a pinnatifid apex. |
Pinnae | (2–)8–15(–20) × (0.6–)1–2.5 cm, incised 3/5–4/5 of width; segments oblong, rounded to acute at apex; proximal pair of veins from adjacent segments running to sinus, or nearly so. |
18–25 pairs, 2–5(–8) × 1–1.5(–2) cm, deeply serrate to incised nearly 3/4 of width, distal pinnae often strongly adnate; segments of rather harsh texture, somewhat oblique, rounded-deltate to often acute; proximal pair of veins from adjacent segments united below sinus with excurrent vein. |
Sori | round, medial to supramedial; indusia tan, hairy, hairs 0.2–0.4 mm; sporangial glands obscure, yellowish, stalked, arising from sporangial stalks. |
round, medial to supramedial; indusia tan, densely stellate-hairy; sporangia glabrous. |
Indument | abaxially of hairs mostly 0.3–1 mm on costae, veins, and blade tissue; veins adaxially with similar hairs but blade tissue usually without hairs, often with scattered yellowish, stalked glands 0.1 mm. |
on both surfaces of numerous, sessile or short-stalked, stellate hairs 0.1–0.2 mm on costae, veins, and blade tissue; rachises and costae sometimes with longer simple hairs to 0.8 mm abaxially. |
2n | = 144. |
= 144. |
Thelypteris kunthii |
Thelypteris sclerophylla |
|
Habitat | Roadsides, ditches, riverbanks, woodlands, limestone sinks | Terrestrial or on rock in limestone hammocks |
Elevation | 0–100 m (0–300 ft) | 0–50 m (0–200 ft) |
Distribution |
AL; AR; FL; GA; LA; MS; SC; TX; e,s Mexico; West Indies; Bermuda; Central America to Costa Rica; South America from Colombia to n Brazil
|
FL; West Indies in the Greater Antilles |
Discussion | Thelypteris kunthii occasionally hybridizes with T. augescens and T. ovata in Florida; hybrids with T. hispidula may also occur. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
In the flora Thelypteris sclerophylla is known only from Dade County, Florida, where it is rare. C. Christensen (1913), C. V. Morton (1951), and D. B. Lellinger (1985) have attributed the basionym to Kunze in Sprengel, but Sprengel clearly credited Poeppig, rightly or wrongly. Sprengel's original description also differs in a number of details from that by G. Kunze (Linnaea 9: 92. 1834), so that Kunze's later attribution of the basionym to himself cannot be accepted. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Thelypteridaceae > Thelypteris > subg. Cyclosorus | Thelypteridaceae > Thelypteris > subg. Goniopteris |
Sibling taxa | ||
Synonyms | Nephrodium kunthii, Christella normalis, Dryopteris normalis, T. macrorhizoma, T. normalis, T. saxatilis, T. unca | Aspidium sclerophyllum, Dryopteris sclerophylla, Goniopteris sclerophylla |
Name authority | (Desvaux) C. V. Morton: Contr. U.S. Natl. Herb. 38: 53. (1967) | (Poeppig ex Sprengel) C. V. Morton: Amer. Fern J. 41: 87. (1951) |
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