Alansmia spathulata (A.R.Sm.) Moguel & M.Kessler
Descripción
Rhizomes very short-creeping to suberect; rhizome scales orangish to brownish, dull, 0.3–1 mm long, somewhat obscured by dense, hyaline setae on margins and surfaces; fronds indeterminate, crowded, often more than 50 per plant, (12–)25–60(–90) cm long; stipes brown, 2–15 cm long, 0.2–0.4 mm diam., with numerous, mostly unbranched, tawny setae 1–2 mm long; blades 1-pinnate (occasionally the rachises 1–2-bifurcate with forks ca. 30° apart), linear, 10–85 X 0.4–1.2(–1.6) cm, very gradually narrowed proximally and with pinnae more widely separated, distally the pinnae often contiguous or imbricate, blades lacking black clavate fungi; pinnae often more than 50 pairs per frond, 2–5(–7) X 2–4 mm, sessile or proximal ones stalked to 2 mm, irregularly ovate, obovate, rhombic, or slightly lobed, larger ones often inequilateral; costae darkened in basal half, otherwise obscure, veins obscure; hydathodes not producing lime-dots; indument of pale setae 1–2 mm long on rachises, costae, veins, and sometimes laminar tissue, rachises abaxially and pinna margins often with paired or fasciculate pale reddish setae in addition to solitary ones, blades also with 1–3-branched hairs 0.1–0.2 mm long; sori 1–3 pairs per pinna, receptacles glabrous; sporangia glabrous; spores tetrahedral-oblate.A
Forma de vida
Epipétrica. -no state-A
Ejemplar revisado
(Related to the synonym Terpsichore spathulata) Chis (Breedlove 24303, LL, MEXU, NY; Matuda 2890, ARIZ, LL, MEXU, MO, TEX). DF (Lyonnet 232, CAS, MO, NY; Rzedowski 35578, IEB). Jal (McVaugh 10043, NY, TEX). Méx (Rzedowski 29309, ASU; Vega A. 591, CHAPA, ENCB, MEXU, NY). Mich (Leavenworth & Hoogstraal 1187, MO, NY). Pue (Reeves R5803, ASU). Ver (Nee & Diggs 24843, MO, UC).A
Elevación
2600 – 4100 mA
Ecología y Hábitat
Pendent in moist, shaded rock crevices and on cliffs, under rock overhangs, and in shallow caves and grottoes.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Estatus del taxón
Epipétrica.A
(A) Como definida actualmente, probablemente una entidad natural (monofilética)
Discusión taxonómica
(In relation to the synonym Terpsichore spathulata) Specimens of T. spathulata from Mexico and Guatemala have previously been determined as Grammitis heteromorpha (Hook. & Grev.) C. V. Morton. The latter species is restricted to the Andes from Colombia to Peru and differs by the larger (1–1.6 mm), black rhizome scales, thicker blades and stouter rachises, and presence of sporangial setae. In addition, specimens of Terpsichore heteromorpha (Hook. & Grev.) A. R. Sm. have blades markedly and regularly bifurcate, with the blade forks diverging 60–90°. Blades of are usually unbranched or sometimes once-forked with the branches divergent less than 60° (e.g., Matuda 2890, MO).
More collections have been seen of this species from Edo. México (20) than from all the other states combined (18). Curiously, the species has not yet been collected in Oaxaca.A
More collections have been seen of this species from Edo. México (20) than from all the other states combined (18). Curiously, the species has not yet been collected in Oaxaca.A