Hymenophyllum tunbrigense (L.) Sm.

  • 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 tunbrigense (L.) Sm.

  • Description

    Species Description - Rhizomes creeping, 0.2–0.3 mm diam.; rhizome hairs 0.3–0.5 mm long, concentrated at base of fronds; fronds arching or erect, 4–12 x 1.2–2.5 cm; stipes 1/3 the frond length, 0.3 mm diam., very narrowly alate distally, glabrous except for occasional short hairs; blades pinnate-bipinnatifid, ovate-lanceolate, glabrous, proximal pinnae not much reduced; rachises barely alate; segments 0.7–1 mm wide, glabrous; margins remotely or distantly serrulate; involucres not immersed, turned nearly at right angles to plane of blades, margins entire to denticulate, 2–2.3 x 1–1.3 mm, receptacles not exserted; 2n = 26 (England, Tristan da Cunha).

  • Discussion

    Trichomanes tunbrigense L., Sp. Pl. 2: 1098. 1753. Type. Uncertain, LINN 1253.4 and 1253.5 are this species.

    Hymenophyllum fucoides (Sw.) Sw. var. frigidum Liebm., Mexic. Bregn. 291 (reprint 139). 1849. Type. Mexico. Oaxaca: “Cerro de Sempoaltepec,” Liebmann s.n. [Pl. Mex. 2152, Fl. Mex. 554] (C!).

    Hymenophyllum tunbrigense is related to H. fucoides and H. ectocarpon but differs in narrower (0.7–1 mm wide) segments, smaller size, glabrous blades, and subentire indusial segments. There is considerable variation in involucral shape and margin over this species’ range. Involucres are oblong and toothed in Oaxaca and Europe, subentire and nearly round in Chihuahua

  • Distribution

    Epiphytic or epipetric (or on soil) in cloud forests or montane rain forests; 1850–2750 m. USA (SC); Mexico; Guat, Hond, Salv, CR, Pan; Jam, Hisp; Ven, Ec, Bol, Chile, n Arg; w Europe, Africa, Austr, NZ.

    Mexico North America| United States of America North America| Guatemala Central America| Honduras Central America| El Salvador Central America| Costa Rica South America| Panama Central America| Jamaica South America| West Indies| Venezuela South America| Amazonas Ecuador South America| Bolivia South America| Chile South America| Argentina South America| Europe| Africa| Tasmania Australia| New Zealand