Cheilanthes lindheimeri Hook.

  • 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 lindheimeri Hook.

  • Description

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    Species Description - Rhizomes long-creeping, horizontal, 1–1.5 mm diam.; rhizome scales lanceolate, concolorous tan to brown, thin to sclerotic, 1–2 mm long, entire; fronds to 25 cm long, 3–20 cm apart on the rhizomes; stipes 1/3–1/2 the frond length, blackish brown, lustrous, terete, with sparse, linear-lanceolate, tan, thin, subentire scales with occasional hair-teeth and hairs at base and some reduced nearly hair-like scales; blades narrowly lanceolate, not especially narrowed proximally, 3–4-pinnate with bead-like segments; pinnae 10–14 pairs, equilateral; adaxial surfaces glabrous but with loose, wool-like mat of white hairs 1–1.5 mm long extending beyond segment margins abaxially; abaxial surfaces with a dense covering of scales, those on the midribs linear-lanceolate, castaneous at bases, on the segments lanceolate, with long marginal cilia throughout the scale length, some scales reduced nearly to stellate hairs; laminar margins recurved but not strongly differentiated, obscured by scales and hairs; spores dark brown; n =2n =90, apogamous (USA).

  • Discussion

    Myriopteris lindheimeri (Hook.) J. Sm., Bot. Voy. Herald 340. 1854. Lectotype (designated here). U.S.A. Western Texas: Lindheimer 744 (K; isolectotypes GH!, P!-2 sheets, SD!, US!, YU!). Cheilanthes albida Baker, Ann. Bot. (Oxford) 5: 212. 1891. Type. Mexico. San Luis Potosi´: region of San Luis Potosi´, 1878, Parry & Palmer 999 (K; isotypes NY!-3 sheets, SD!, US!, frag. NY!).

    Cheilanthes lindheimeri is distinct by its long-creeping rhizome with broad, concolorous scales and the adaxial blade surfaces appearing to be densely covered with fine curly hairs, though these are actually hairs from margins of abaxial costal scales that extend beyond the segment margins.

  • Distribution

    Among basaltic rocks in matorral or grasslands; 1000-2300 m. USA (Ariz, N Mex, Tex); Mexico.

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