Thelypteris nevadensis |
Thelypteris hispidula |
|
---|---|---|
Nevada Marsh fern, Sierra Marsh fern, Sierra wood fern |
hairy maiden fern, roughhairy maiden fern |
|
Stems | creeping for 2–5 cm, then ascending or suberect, 1.5–3 mm diam. |
|
Leaves | monomorphic, dying back in winter, tightly clustered, (25–)40–105 cm. |
|
Petiole | straw-colored, 3–20(–35) cm × 1–3 mm, at base with scales tan to reddish brown, ovate, glabrous. |
|
Blade | elliptic, 20–70 cm, proximal 4–10 pinna pairs gradually reduced (smallest 5–20 mm), blade tapering gradually to pinnatifid apex. |
|
Pinnae | 3–10 × (0.6–)1–2 cm, deeply pinnatifid to within 1 mm of costa; segments oblong to linear, oblique (sides slanted, not perpendicular to costa), entire to crenulate; proximal pair of veins from adjacent segments meeting margin above sinus. |
|
Sori | round, supramedial; indusia tan, glabrous or short-ciliate, sometimes also with glands; sporangia glabrous. |
|
Indument | abaxially of sparsely set hairs 0.2–0.7 mm on rachises, costae, and sometimes veins, also of numerous orangish, sessile to usually short-stalked glands on blade tissue; blades adaxially glabrous except along costae. |
|
2n | = 54. |
|
Thelypteris nevadensis |
Thelypteris hispidula |
|
Habitat | Terrestrial in woods and meadows, especially near springs, seepage areas, and streams | |
Elevation | 0–1800 m (0–5900 ft) | |
Distribution |
CA; OR; WA; BC
|
AL; FL; GA; LA; MS; SC; TX; North America; Mexico; Central America; South America; tropical and subtropical; West Indies in the Antilles; Asia; Africa
|
Discussion | Thelypteris nevadensis is named for the Sierra Nevada and, contrary to its common name, is not found in Nevada. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 4 (1 in the flora). This species and the next are included in Christella subg. Christella by R. E. Holttum (1982). The relationship between Old World and New World varieties is unstudied. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 2. | FNA vol. 2. |
Parent taxa | Thelypteridaceae > Thelypteris > subg. Parathelypteris | Thelypteridaceae > Thelypteris > subg. Cyclosorus |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | Nephrodium nevadense, Dryopteris nevadensis, Dryopteris oregana, Parathelypteris nevadensis | Aspidium hispidulum, Christella hispidula, Cyclosorus quadrangularis, Dryopteris hispidula, Dryopteris quadrangularis, T. quadrangularis |
Name authority | (Baker) Clute ex C. V. Morton: Amer. Fern J. 48: 139. (1958) | (Decaisne) C. F. Reed: Phytologia 17: 283. (1968) |
Web links |
|