Cheilanthes villosa Maxon

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Pteridaceae

  • Scientific Name

    Cheilanthes villosa Maxon

  • Description

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    Species Description - Rhizomes compact, horizontal, 2–3 mm diam.; rhizome scales linear-lanceolate, mostly bicolorous, with distinct black center and narrow light brown margins, 4–5 mm long with longattenuate tips, lustrous, entire; fronds to 30 cm long, clumped; stipes dark reddish brown, terete, densely clothed with scales imbricate, ascending, scattered, tan, lanceolate, 3–4 mm long, mixed with abundant reduced linear scales; blades narrowly lanceolate to ovate, 3–4-pinnate, 1.5–5 cm wide; pinnae 8–15 pairs, equilateral; abaxial scales deltate or ovate to lanceolate, shallowly cordate at base, often with overlapping basal lobes, conspicuous, strongly imbricate and spreading laterally, far exceeding the segment margins and conspicuous from the adaxial side, usually concealing ultimate segments abaxially, whitish with orangebrown centers, erose-dentate, not ciliate; ultimate segments round to oval, bead-like, mostly less than 1 mm long; adaxial surfaces with scattered to dense curly white hairs; abaxial surfaces nearly glabrous except for a few curly white hairs; laminar margins recurved, but only weakly differentiated; sporangia 32-spored; spores brown. n=2n =90, apogamous (USA).

  • Discussion

    Type. U.S.A. Arizona: Chiricahua Mts, Sep 1881, Lemmon s.n. (GH!, frag. US!).

    Unverified, Doubtful, or Mistaken Reports. Ags (reported by de la Cerda Lemus & Siqueiros, 1985, but not verified).

    Cheilanthes villosa is distinct by its large deltate scales on costae abaxially (2 mm wide and spreading, visible from adaxial side) and scattered curly hairs adaxially.

  • Distribution

    Cliffs and rocky slopes, usually on limestone; 1450–2400 m. USA (Ariz, N Mex, Tex); Mexico.

    Mexico North America| Arizona United States of America North America| Texas United States of America North America| New Mexico United States of America North America|