|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Perennial, in soil or on or among rocks; rhizome creeping to erect, scaly
Leaves generally all ± alike (or of 2 kinds, fertile and sterile), generally < 50 cm, often < 25 cm; petiole generally thin, wiry, often dark, in transverse section with vascular strands generally 13, less often many in a circle; blade generally pinnate or ± palmate-pinnate (see Adiantum ), often 2 or more compound, lower surface often with glands, ± powdery exudate, hairs, or scales; segments round, oblong, fan-shaped, or otherwise, veins generally free
Sporangia in sori or not, marginal, submarginal, or along veins, sometimes covered by recurved, often modified segment margins (false indusia); true indusia 0; spores spheric, sides sometimes flat, scar with 3 radiating branches
Genera in family: ± 40 genera, 500 species: worldwide, especially dry areas. Definition of Cheilanthes and related genera problematic; traditional limits often untenable.
Plant in soil or rock crevices; rhizome short- to long-creeping, scales overlapping, narrowly linear, light- to reddish or medium-brown, often with darker mid-stripe
Leaves erect, persistent, < 1 m; petioles ± cylindric, generally dark or reddish brown to blackish, ± shiny, glabrous; blade 14-pinnate; segments generally stalked, generally free, linear to rounded, lobed or not, often folded lengthwise when dried; veins generally free
Sporangia in ± continuous, submarginal bands, among a whitish to yellowish exudate or not; segment margin generally recurved, generally modified; spores tan to light yellow
Species in genus: ± 35 species: tropical, temp, few in Eur, 0 in Asia
Etymology: (Greek: dusky, from bluish gray leaves)
Reference: [Tryon 1957 Ann Missouri Bot Gard 44(2):125193]
Not commonly cultivated.
Rhizome short-creeping, branched, to 8+ cm, 23 mm wide; scales brownish with darker mid-stripeSee the CNPS Inventory for information about endangerment and rarity.
Leaves clustered, 1530(36) cm, 411 cm wide, olive-green; petiole 1(2) mm wide, ± flat or upper surface grooved; blade 2-pinnate, narrowly triangular to oblong-triangular; 1° leaflets generally not overlapping, ± spreading; segments 58 mm, 14 mm wide, linear to oblong, with a small point at tip, margins wavy-crenate, often (especially sterile) whitish, fertile not appearing folded in half, recurved margins not meeting, lower surface therefore visible
Ecology: Generally in crevices of or at bases of granite (in CA) or igneous rock
Elevation: 12001900 m.
Bioregional distribution: e Desert Mountains (Providence, New York mtns)
Distribution outside California: to Colorado, Texas, Baja California
Synonyms: P. longimucronata Hook. misapplied