Argyrochosma microphylla (Kuhn) Windham
Descripción
Rhizomes short, compact, horizontal; rhizome scales brown to dark orange, 4–7 mm long; fronds to 25 cm long, clumped; stipes 1⁄3–1⁄2 the frond length, castaneous, terete to somewhat flattened adaxially, glabrous; blades deltate to ovate, 3–4-pinnate; pinnae 5–8 pairs, alternate; rachises slightly to strongly flexuous, flattened or shallowly grooved adaxially; segments orbicular to cordate, 1–3 mm, articulate, fertile often folded, dark color of stalks stopping abruptly at segment bases; adaxial and abaxial surfaces glabrous, gray-green adaxially; sori submarginal, elongate along vein ends and forming marginal bands 1 mm wide, laminar margin curved, undifferentiated; fertile segments often folded in half; 2n=54 (Coah, USA).
A
A
Forma de vida
Usually epipetric.A
Ejemplar revisado
Chih (Harvey 1512, MICH; Pringle 440, MICH, NY, 458, NY; Worthington 12521, NY). Coah (Harvey 1196, MICH; Hinton 16510, NY; Muller 3079, MICH, NY). NL (Pennell 17188, MEXU, NY, US). Son (Fishbein 2156, ARIZ). Zac (Stanford et al. 47, NY).A
Elevación
1000 – 2300 mA
Ecología y Hábitat
Rocky limestone hillsides and cliffs, open talus slopes.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
Argyrochosma microphylla is distinct by the small segments and shallowly grooved rachises. Some plants have ascending pinnae like A. limitanea, some zig-zag rachises like A. fendleri. Dorr et al. 2095 (NY), has strongly flexuous rachises like A. fendleri, but the rachillae are less flexuous, and it lacks farina. This species may include diploid and tetraploid cytotypes (Knobloch et al., 1973).A