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Perennial herb, in soil or on or among rocks; rhizome creeping to erect, scaly. Leaf: generally all ± alike (or of 2 kinds, fertile, sterile), generally < 50 cm, often < 25 cm; stipe generally thin, wiry, often dark, ×-section with vascular strands generally 1–3, less often many in circle; blade generally pinnate or ± palmate-pinnate (see Adiantum), often >= 2-compound, abaxially often with glands, ± powdery exudate, hairs, or scales; segments round, oblong, fan-shaped, or other, veins generally free. Sporangia: in sori or not, marginal, submarginal, or along veins, covered by recurved, often modified segment margins (false indusia) or not; true indusia 0; spores spheric, sides flat or not, scar with 3 radiating branches.
± 40 genera, 500 species: worldwide, especially dry areas. [Windham 1993 FNANM 2:122–186] Definition of Cheilanthes, related genera problematic; traditional limits often untenable. —Scientific Editors: Alan R. Smith, Thomas J. Rosatti.
Key to Pteridaceae
Plant in soil or rock crevices; rhizome short- to long-creeping[-decumbent], generally many-branched, scales generally lance-linear, pale to dark, mid-stripe dark or not. Leaf: < 75 cm, young leaf tip hooked or coiled; stipe cylindric, red-brown to ± black; blade generally 2–3-pinnate, generally oblong to narrowly triangular; segments generally small, ± flat or abaxially concave (from recurved margins). Sporangia: along margin, in discrete patches to continuous, partly to completely covered by recurved margin (generally not recurved in Cheilanthes cooperae).Key to Cheilanthes
150+ species: generally America, generally dry areas. (Greek: lip flower, from location of sporangia)
Rhizome short- to long-creeping; scales of 2 kinds, maroon with a tan, curly, hair-like tip, and tan ± throughout, narrower. Leaf: 15–20(30) cm, 2–4 cm wide; scales 0; hairs generally dense, long, tangled or matted, nonglandular, ± white to tan; stipe < 1 mm wide; segments small, ± round, ± flat, adaxially ± gray-green from dense, generally white hairs, abaxially tan from dense (surface not visible), tan hairs. Sporangia: 32- or 64-spored, ± visible at segment margin.
2n=60. Dry, rock outcrops; 100–800 m. Southwestern California; Baja California. Hybrids uncommon with Cheilanthes covillei (Cheilanthes ×fibrillosa). [Online Interchange]
Previous taxon: Cheilanthes intertexta
Next taxon: Cheilanthes parryi
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 27 2014
Citation for this treatment: [Author of taxon treatment] 2013. Cheilanthes, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=19086, accessed on Jul 27 2014
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