Hymenophyllum hirsutum (L.) Sw.

  • Authority

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

  • Family

    Hymenophyllaceae

  • Scientific Name

    Hymenophyllum hirsutum (L.) Sw.

  • Description

    Species Description - Rhizomes long-creeping, 0.3–0.5 mm diam.; rhizome hairs simple, 1 mm long; fronds 3–12 x 1.5–3 cm, pendent or subdistant; stipes 0.2–0.4 mm diam., alate ca. 1/2 or more their length, hairs forked or stellate; blades pinnate-pinnatifid, ovate; rachises alate; pinna margins plane to slightly crispate, entire; hairs on veins stellate, some stalked, some sessile; hairs on margins 2- forked, bistellate or basally twice-stellate; involucres nearly round, margins with stalked, stellate hairs, receptacles not exserted; 2n=72 (Jam).

  • Discussion

    Trichomanes hirsutum L., Sp. Pl. 2: 1098. 1753. Sphaerocionium hirsutum (L.) C. Presl, Hymenophyllaceae 34. 1843. Type. Based on Filicula digitata Plumier, Traite´ Foug. Ame´r. 73, pl. 50B, 1705, most likely illustrating a plant from the West Indies. Trichomanes ciliatum Sw., Prodr. 136. 1788. Hymenophyllum ciliatum (Sw.) Sw., J. Bot. (Schrader) 1800(2): 100. 1801. Sphaerocionium ciliatum (Sw.) C. Presl, Hymenophyllaceae 34. 1843. Type. Jamaica. Swartz s.n. (S?). Hymenophyllum ciliatum (Sw.) Sw. var. nudipes Kunze, Linnaea 18: 351. 1844. Type. Mexico. Leibold 72 p.p. (LZ, destroyed; isotype B). See Morton (1947) for more synonymy.

    Among the Mexican hymenophyllums with hairs on only the blade margins and veins, H. hirsutum is distinct by stipes alate at least in distal half.

  • Distribution

    Epiphytic or terrestrial in wet montane forests; 600–1900 m. Mexico; Guat, Bel, Hond, Nic, CR, Pan; Gr & L Ant; Col, Ven, Trin, Guy, Sur, Fr Gui, Ec, Peru, Braz, Bol.

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