Marsilea vestita Hook. & Grev.

  • Authority

    Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.

  • Family

    Marsileaceae

  • Scientific Name

    Marsilea vestita Hook. & Grev.

  • Description

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    Species Description - 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.

  • Discussion

    Zaluzianskia vestita (Hook. & Grev.) Kuntze, Revis. Gen. Pl. 2: 823. 1891. Lectotype (designated by Johnson, 1986: 62). U.S.A. Columbia River, Scouler 338 (K; isolectotypes GH, NY!). Marsilea mucronata A. Braun, Amer. J. Sci., ser. 2, 3: 55. 1847. Type. U.S.A. [North Dakota:] near Devil’s Lake, Geyer 71 (MO!; isotypes K, MO, NY!, US!). Marsilea minuta E. Fourn., Bull. Soc. Bot. Fr. 27: 329. 1880, hom. illeg., non L., 1771. Type. Mexico. San Luis Potosi´: in 1876 & 1882, Schaffner s.n. (P? isotype NY!).

    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). 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).

  • Distribution

    Edges of marshes, ponds, and seasonal lakes; 0– 500(–1900) m. Sw Canada, w USA; Mexico; Peru.

    Canada North America| México Mexico North America| Peru South America|