Alansmia cultrata (Willd.) Moguel & M.Kessler
Descripción
Rhizomes very short-creeping to suberect; rhizome scales castaneous, lustrous, 1–1.5 mm long, setose; fronds indeterminate, mostly 12–40 cm long; stipes gray-brown to blackish, dull, 1–2 cm long, 0.5 mm diam., with dense hyaline to pale yellow setae 2–2.5 mm long; blades pinnatisect to fully pinnate, linear, 6–38 X 1.8–4 cm, gradually tapering to both ends, lacking black clavate fungi; segments 13–52 pairs, (8–)12–20 X 4–8 mm at base, broadly adnate but less so on acroscopic edge, rounded to subacute at apices; costae flexuous, brownish nearly to apices; veins not or faintly visible; hydathodes not producing lime-dots; indument of pale yellowish to slightly reddish setae 0.8–1.5 mm long on rachises, costae, veins, and laminar tissue, setae abaxially along rachis and on segment margins solitary, paired, or in fascicles of 3, also of scattered branched hairs to 0.3 mm; sori 3–7 pairs per pinna, receptacles glabrous; sporangia with several setae 0.3–0.6 mm long on capsules; spores ellipsoid or tetrahedraloblate, monolete or trilete.A
Forma de vida
(pendula). EpífitaA
Ejemplar revisado
(Related to the synonym Terpsichore cultrata) Chis (Breedlove 19946, DS, MEXU, 29971, 33641, DS, MEXU, 55544, CAS). Gro (Hinton 14280, ARIZ, ENCB, LL, MO, NY, TEX, US; Rzedowski 18612, ENCB). Oax (Mickel 4271, 5295, 6743, NY, UC; Smith 453, UC).A
Elevación
1400 – 2800 mA
Ecología y Hábitat
On trunks (often on tree ferns) or occasionally on wet rocks.A
Tipo de vegetación
Bosque de neblina/mesófiloA
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
(In relation to the synonym Terpsichore cultrata) The shorter stipes, longer sporangial setae, clustered setae on segment margins, and often pinnate blades pinnae distinguish T. cultrate from T. asplenifolia. The presence of rhizome scales and larger pinnae distinguish it from T. mollissima. Terpsichore senilis differs in having longer, more numerous sporangial setae and more distant, smaller pinnae that are contracted to half their width at their bases.
A chromosome report, n=37, for Ctenopteris cultrata in Costa Rica was published by Evans (Caryologia 16: 671–677. 1963), but we identify the voucher (UC 58-234-1) as Terpsichore lanigera (Desv.) A. R. Sm., a close relative not known from Mexico. A second voucher (UC 58-233-1) cited for another count (also n=37) for Ctenopteris cultrata by Evans, supposedly in UC, has not been found.A
A chromosome report, n=37, for Ctenopteris cultrata in Costa Rica was published by Evans (Caryologia 16: 671–677. 1963), but we identify the voucher (UC 58-234-1) as Terpsichore lanigera (Desv.) A. R. Sm., a close relative not known from Mexico. A second voucher (UC 58-233-1) cited for another count (also n=37) for Ctenopteris cultrata by Evans, supposedly in UC, has not been found.A