Trichomanes hookeri C.Presl

  • Authority

    Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.

  • Family

    Hymenophyllaceae

  • Scientific Name

    Trichomanes hookeri C.Presl

  • Description

    Species Description - Rhizome filiform (0.2-0.3 mm in diam.), intricately wide-creeping and forming mats, densely clothed with brown hairlike rhizoids 0.5-1 mm long. Fronds short-stipitate; stipes less than 5 mm long, densely radiculose like the rhizome, not winged; blades linear or lance-elliptic to oblanceolate, 2-6 cm long, 0.6-1.2 cm broad, glabrous, roundish at apex, long-cuneate at base; margin nearly entire to sinuate, crenate, or crenately lobed; costa giving off once- or twice branched, pinnately ananged veinlets, these excunent to the submarginal vein; false veins numerous, also excunent to the submarginal vein; tissue light green, membranous, delicately translucent. Sori few (1-5), solitary on apical lobes; involucres cylindric-turbinate, 1-1.5 mm long below the abruptly flaring mouth, completely immersed, not 2-lipped.

  • Discussion

    Type. Wiles & Hegson s.n., from Jamaica (E).

    Syn. Trichomanes muscoides of Hooker & Greville, Icon, filic. 2: t. 179. 1831, not Swartz, 1802.

    (Type. Wiles & Hegson s.n., as above.)

    Microgonium berteroanum K. Presl, Hymenophyllaceae 111, t. 6, fig. B. 1843. (Type. Bertero s.n., from the Dominican Republic, PRC, as cited by Wessels Boer, 1962.)

    Microgonium hookeri (K. Presl) K, Presl, Abh. Bohm, Ges. Wiss, ser, 5, 5: 335. 1848.

    Hemiphlebium hookeri (K. Presl) Prantl, Unters. Morph. Gefasskrypt. 1: 46, /. 2, fig 19. 1875, notK. Presl, 1848.

    Trichomanes muscoides var, major Jenman, Bull. Bot. Dept. Jamaica no. 20: 7. 1890. (Type, Presumably a Jenman specimen, perhaps at NY, not seen.)

  • Distribution

    General Distribution. Greater Antilles. Distribution in Puerto Rico. Known from few collections; recorded from Lares, Utuado, and Yabucoa. The only collection during this century is: Utuado, Rio Abajo State Forest, ca. 1.6 km due SW of Campamento Crozier, 320-340 m, 13 Aug 1984, Proctor 40704 (SJ, US). Habitat. Mossy tree-trunks (esp. tree-fems) in deep shade, also on wet shaded rocks, at middle elevations (300-400 m), very rare.