Ophioglossum nudicaule L.f.

  • Authority

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

  • Family

    Ophioglossaceae

  • Scientific Name

    Ophioglossum nudicaule L.f.

  • Description

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    Species Description - Stems cylindrical or swollen but not globose, 2–4 mm diam.; roots unbranched; fronds 1–2 per stem, 2–8 cm long, basal sheaths inconspicuous, fragile, not persistent; sterile blades 0.5–2.5x 0.2–0.8 cm, lanceolate or elliptic to ovate–lanceolate, plane, bases cuneate or attenuate, apices acuminate; venation reticulate in smaller leaves, bireticulate in larger leaves, often obscured because of thick blade texture; fertile spikes 1.5–15 cm long, 2–6 times the length of the sterile blades; 2n=240 (India).

  • Discussion

    Type. South Africa. Cape of Good Hope, Thunberg s.n. (UPS-Thunb. 25286, microfiche UC!).

    Ophioglossum ellipticum Hook. & Grev., Icon. Filic. 1: pl. 40A. 1831. Type: Guyana. Demerara, Parker s.n. (K).

    Ophioglossum tenerum Mett. ex Prantl, Ber. Deutsch. Bot. Ges.1: 352. 1883. Ophioglossum nudicaule L.f. var. tenerum (Mett. ex Prantl) R. T. Clausen, Mem. Torrey Bot. Club 19: 146. 1938. Type. U.S.A. Georgia: s. coll. s.n. (B) (see R. T. Clausen, 1938: 147).

    Unverified, Doubtful, or Mistaken Reports. Chih (Pringle 1563, cited by Knobloch & Correll, 1979, but not verified). Mich (Arse`ne s.n., cited as O. ellipticum by Conzatti, 1939, but not verified). Wagner et al. (1984) showed that two forms of O. nudicaule intergrade, the small form called var. tenerum, the larger one previously known as O. ellipticum. Both are found in Mexico, the smaller with reticulate veins, the larger with bireticulate veins. A pale band often occurs in the middle of dried blades

  • Distribution

    Terrestrial in meadows and pastures; 1200–3100 m. Se USA; Mexico; Guat, Bel, Hond, Nic, CR, Pan; Cuba, Hisp; Col, Ven, Guy, Sur, Fr Gui, Ec, Galapagos, Peru, Braz, Bol, Arg; Africa, trop Asia, Australia, Hawaii.

    Hawaii United States of America North America| Queensland Australia Oceania| Argentina South America| Bolivia South America| Brazil South America| Peru South America| Galápagos Islands Ecuador South America| Ecuador South America| French Guiana South America| Suriname South America| Guyana South America| Venezuela South America| West Indies| Cuba South America| Panama Central America| Nicaragua Central America| Honduras Central America| Belize Central America| Guatemala Central America| México Mexico North America|