Cheilanthes chipinquensis Knobloch & Lellinger
Descripción
Rhizomes short-creeping, horizontal, 2–3 mm diam.; rhizome scales linear-lanceolate, 3–4 mm, bicolorous with black center and orange margins, tips attenuate, entire; fronds 12–37 cm, clumped; stipes 1⁄3–1⁄2 the frond length, brown, terete, densely clothed with appressed or ascending tan hairs 2–3 mm and hairlike scales; blades lanceolate to narrowly lanceolate, bipinnate to tripinnate-pinnatifid, 3.5–7.5 cm wide, firm to subcoriaceous; pinnae 17–25 pairs; costae with hairs and hair-like scales as on stipes; terminal segments often unequally pinnately lobed at bases, subterminal ultimate segments ovate, ca. 1 mm diam., terminal oblong, 3 X 1 mm; adaxial blade surfaces with scattered crinkly white hairs; abaxial blade surfaces sparsely to densely hairy with crinkly white or tan hairs, these generally not totally obscuring the laminar surfaces; indusia slightly modified, continuous; sporangia 64-spored; spores tan to light brown; 2n=58, 60 (NL).A
Forma de vida
Epipétrica, TerrestreA
Ejemplar revisado
NL (Aguirre s.n., 6 Dec 1976, ENCB; Mc-Pherson 883, CAS, MICH; Muller 2701, GH p.p.; Pennell 16951, US; Pringle 2776, UC; Reeves 6087, 6098, ASC; Rodríguez L. s.n., 28 Apr 1985, UNL).
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Distribución
México (país) EndémicoA
Elevación
800 – 1200 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 chipinquensis is closely allied to the widespread C. tomentosa but can be distinguished by the less dense indument and the terminal segments about three times the length of the lateral segments. The former has 64-spored sporangia, versus the 32-spored sporangia in C. tomentosa. Knobloch (pers. comm.) suggested that the diploid C. chipinquensis may be a parent of the triploid C. tomentosa. Reeves (1979) pointed out some intermediate specimens, but was unsure if they were hybrids. Cheilanthes chipinquensis is generally found growing together with C. tomentosa, and care is needed for their separation.
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