Cheilanthes pellaeopsis Mickel
Descripción
Rhizomes compact, horizontal, ca. 5 mm diam.; rhizome scales linear-lanceolate, 4–5 mm long, 10–12 cells wide at base, concolorous black, lustrous, entire, often with brown marginal row of cells and brown tips; fronds to 30 cm long, clumped; stipes 1⁄2–2⁄3 the frond length, black, terete, glabrous; blades pentagonal, 3–4-pinnate, 12–15 cm wide; pinnae 8–10 pairs; segments linear, mostly 7–12 mm long, 1.1–1.3 mm wide, apical ones to 20 mm long; adaxial and abaxial surfaces glabrous, pebbly; laminar margins strongly recurved, weakly differentiated, the false indusia nearly covering the abaxial surfaces of the segments, white, firm, 0.3–0.5 mm wide, entire, papillose, slightly to strongly decurrent, with vein endings pronounced and sunken in pits, some pits with slight white farina; spores tan to light brown.A
Forma de vida
data unavailableA
Ejemplar revisado
Gro (Anderson & Laskowski 4394, NY). Jal (only the type). Oax (Hunn OAX-998, MEXU). Tam (Diggs & Nee 2378, F; Webster & Webster 18, TEX).
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Distribución
México (país) EndémicoA
Elevación
1975 – 2300 mA
Ecología y Hábitat
Among limestone rocks.A
Tipo de vegetación
Bosque de pino-encinoA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The foliar axes of this species are black, similar to those of the Cheilanthes angustifolia complex, but the segments are linear with the margins strongly recurved to nearly covering the abaxial laminar surfaces. The vein endings are notably pronounced, with slight white farina.
Cheilanthes pellaeopsis is closely allied to C. hintoniorum, but is larger with more pinnae pairs, farina, and broader rhizome scales. Cheilanthes pellaeopsis resembles C. decomposita in dissection and the swollen vein ends, dark axes, and black rhizome scales, but the latter has more strongly differentiated false indusia, non-papillate margins, non-decurrent indusia, broader segments (1.5–2.5 vs. 1.1–1.3 mm), indusia not covering the abaxial surfaces, black spores, more castaneous to purplish brown axes, and prominent veins. Cheilanthes pellaeopsis resembles C. purpusii, which differs in having segments mostly 3–7 mm long, apical ones 5–8(–12) (vs. segments 7–12, apical ones to 20 in C. pellaeopsis). Possibly it is an extreme form of C. purpusii. More collections are needed.
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Cheilanthes pellaeopsis is closely allied to C. hintoniorum, but is larger with more pinnae pairs, farina, and broader rhizome scales. Cheilanthes pellaeopsis resembles C. decomposita in dissection and the swollen vein ends, dark axes, and black rhizome scales, but the latter has more strongly differentiated false indusia, non-papillate margins, non-decurrent indusia, broader segments (1.5–2.5 vs. 1.1–1.3 mm), indusia not covering the abaxial surfaces, black spores, more castaneous to purplish brown axes, and prominent veins. Cheilanthes pellaeopsis resembles C. purpusii, which differs in having segments mostly 3–7 mm long, apical ones 5–8(–12) (vs. segments 7–12, apical ones to 20 in C. pellaeopsis). Possibly it is an extreme form of C. purpusii. More collections are needed.
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