Marsilea vestita Hook. & Grev.
Descripción
Plants forming diffuse or dense clones; roots arising at nodes; petioles 2–20 cm long, sparsely hairy; pinnae 4–20 X 4–20 mm, hairy to glabrescent; sporocarp stalks erect, unbranched, attached at bases of petioles (occasionally up to 3 mm above bases), 0.5–25 mm, not hooked at tips; sporocarps perpendicular to stalk tips or slighly nodding, 3.5–7.5 X 3–6.5 mm, 1.5–2 mm thick, elliptic to nearly round in lateral view, hairy but soon glabrate, scars left by abraded hairs often appearing as purple or brown specks; proximal tooth of each sporocarp 0.3–0.6 mm long, blunt, distal tooth 0.4–1.2 mm, acute, often hooked at tip; raphes 1.1–1.7 mm; sori 14–22 per sporocarp.A
Ejemplar revisado
BCS (Carter & Moran 5934, BM, MEXU, UC; Wiggins 15162, CAS, ENCB, GH, MEXU, TEX, UC). Coah (Palmer 467, K, MO, NY, UC, US). DF (Schaffner 20, in 1875, NY). Dgo (Johnston et al. 11448, LL). NL (Seigler et al. 1292, TEX). SLP (Parry & Palmer 1010, F, K, MO, NY, US). Sin (Jones 23509, MO, UC). Son (Felger 85–991, ARIZ, TEX, UC). Zac (Jones 157, GH, DS, MO, US).
Unverified, Doubtful, or Mistaken Reports. Chih (Spellenberg 9557, MEXU, NMC, NY cited by Spellenberg et al., 1996, as M. ancyclopoda, but not verified; the specimen is vegetative, and possibly M. vestita, as annotated by Yatskievych, 1996). Gro (cited by Lozada, 1994, but not verified).
A
Unverified, Doubtful, or Mistaken Reports. Chih (Spellenberg 9557, MEXU, NMC, NY cited by Spellenberg et al., 1996, as M. ancyclopoda, but not verified; the specimen is vegetative, and possibly M. vestita, as annotated by Yatskievych, 1996). Gro (cited by Lozada, 1994, but not verified).
A
Elevación
0 – 500(– 1900) mA
Ecología y Hábitat
Edges of marshes, ponds, and seasonal lakes.A
Categoría IUCN
No incluidaB
Categoría NOM-059-SEMARNAT-2010
No incluidaC
Discusión taxonómica
The most widespread subspecies, subsp. vestita, occurs throughout the range of the species and is the only one known from Mexico. A second subspecies, subsp. tenuifolia (Engelm. ex A. Braun) D. M. Johnson, is confined to central Texas (Johnson, 1986), but this apparently intergrades with subsp. vestita and is no longer considered separable by Johnson (1993).A