Hymenophyllum hirsutum (L.) Sw.

  • Authority

    Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.

  • Family

    Hymenophyllaceae

  • Scientific Name

    Hymenophyllum hirsutum (L.) Sw.

  • Description

    Species Description - Rhizome long-creeping, 0.3-0.5 mm diam.; rhizome hairs 1.0 mm long; fronds 3-12 cm long, pendent or subdistant; stipe 0.2-0.5 mm diam., alate ca. ½ or more its length, hairs forked or stellate; blade pinnate-pinnatifid, ovate, 1.5-3.0 cm wide; rachis alate; pinna margin plane to slightly crispate; hairs on veins stellate, some stalked, some sessile; hairs on margin twice-forked, bistellate or basally twice-stellate; involucres nearly round, margin with stalked stellate hairs, receptacle not exserted.

  • Discussion

    Trichomanes hirsutum Linnaeus, Sp. pl. 2: 1098. 1753. Sphaerocionium hirsutum (Linnaeus) Presl, Hymenophyllaceae 34. 1843. Type. Based on Filicula digitata Plumier, Traité foug. Amér. 73, t. 50B. 1705, most likely a plant of the West Indies. Trichomanes ciliatum Swartz, Prodr. veg. ind. occ. 136. 1788. Hymenophyllum ciliatum (Swartz) Swartz, J. Bot. (Schrader) 1800(2): 100. 1801. Sphaerocionium ciliatum (Swartz) Presl, Hymenophyllaceae 34. 1843. Type. Jamaica. Swartz s.n. (S?). Hymenophyllum ciliatum var. nudipes Kunze, Linnaea 18: 351. 1844. Type. Mexico. Leibold 72 p.p. (LZ, destroyed; isotype B). See also Morton (1947) for more synonymy. Among the Oaxacan Hymenophyllums with hairs on the blade margin and veins only, H. hirsutum is distinct by its stipe being alate at least half way to the base.

  • Distribution

    Epiphytic or terrestrial in wet montane forests; Choapan, Ixtlán, Tehuantepec, Villa Alta; 600-1900 m. Mexico (Pue, Oax, Chis); Guat to Pan; WI, Trin; Col to Gui, to Bol, Braz.

    Mexico North America| Brazil South America| French Guiana South America| Colombia South America| Trinidad and Tobago South America| West Indies| Panama Central America| Guatemala Central America|