Anemia semihirsuta Mickel
Descripción
Rhizomes horizontal, compact, short-creeping, 4–7 mm diam.; rhizome hairs orange; fronds erect, 10–30 cm tall; stipes 6–18 cm long, ca. 1⁄2 the frond length, ca. 1 mm diam., stramineous, hirsute; blades narrowly oblong or narrowly deltate, 1-pinnate, the proximal 1–5 pairs of pinnae incised, chartaceous, hirsute; pinnae 5–10 pairs, opposite to subopposite, broadly oblong, cuneate at bases, often excavate basiscopically on lower margin, apices obtuse, margins minutely denticulate; veins mostly free, with 0–2(–6) anastomoses per pinna; fertile pinnae approximate to the sterile pinnae, usually somewhat surpassing the sterile blades in height; spores with rugulose, narrow, distant ridges; 2n=228 (Oax).A
Ejemplar revisado
Chis (Breedlove 22268, 32536, DS; Matuda 4802, LL, MEXU, NY). Oax (Mickel 887, 1120, 1299, 4713, 4758, NY). Ver (Calzada et al. 10180, XAL; Calzada & Vázquez B. 10236, XAL).
A
A
Elevación
900 – 1600 mA
Ecología y Hábitat
Uncommon on disturbed, partially shaded banks in mesic forests.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
This species is apparently of hybrid origin between A. hirsuta and a diploid race of A. phyllitidis. See Mickel (1982) for details. It may well be a triploid apomict rather than a sexual hexaploid, but at this time we are uncertain. The backcross of A. semihirsuta to A. hirsuta shows 2n=ca. 76II and 38I at meiosis (Oax). A collection with narrower pinnae, but with well formed spores, is probably of this species (Chis: Matuda 17901, DS, F, MEXU). A Chiapas collection (Matuda 1767, MICH, NY) that has malformed spores and casually anastomosing veins differs from typical A. semihirsuta in having larger pinnae and resembles A. X didicusana (see discussion under A. phyllitidis).A