Cheilanthes jamaicensis Maxon
Descripción
Rhizomes short-creeping, horizontal, ca. 2 mm diam.; rhizome scales linear-lanceolate, bicolorous with black central stripe and tan margins, 2–3 mm long, entire; fronds to 35 cm long, clumped; stipes 1⁄3–2⁄3 the frond length, castaneous, terete, with appressed, whitish, linear scales, 2–3 mm long, rachises with similar scales; blades lanceolate, tripinnate-pinnatifid proximally, tripinnate distally; ultimate segments distant, constricted at bases, narrowly elliptic, mostly 1–2 X 1 mm (or less); costae and costules abaxially with numerous narrow scales like those of rachises and stipes; adaxial surfaces with scattered hairs; abaxial surfaces densely to sparsely villous, hairs white, usually not obscuring laminar tissue; laminar margins recurved, slightly differentiated, whitish; sporangia 32-spored; spores brown.
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Ejemplar revisado
Chis (Breedlove 40736, DS; Münch 45, DS). Coah (Muller 3252, UC, US; Pennell 17347, MEXU, NY, US). Hgo (Moore 1683, UC, US). NL (Kenoyer 1100, US; Pringle 2603, UC). SLP (Pray 3062, LAM, NY, US; Whiting 829, MEXU, US, 1078, MEXU, MICH, US).
Unverified, Doubtful, or Mistaken Reports. Ver (reported by Smith, 1981, but not verified).
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Unverified, Doubtful, or Mistaken Reports. Ver (reported by Smith, 1981, but not verified).
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Elevación
1000 – 2400 mA
Ecología y Hábitat
On limestone.A
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Cheilanthes jamaicensis has linear, white, appressed scales 4–8 cells wide (and few if any hairs) on costae, whereas C. tomentosa has a mixture of twisted orange-tan hairs and only sparse scales mostly 2–4 cells wide.
Cheilanthes jamaicensis has an unusual disjunct distribution, occurring in Jamaica and in both northern and southern Mexico.
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Cheilanthes jamaicensis has an unusual disjunct distribution, occurring in Jamaica and in both northern and southern Mexico.
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