Hymenophyllum fucoides (Sw.) Sw.

  • 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

    Hymenophyllum fucoides (Sw.) Sw.

  • Description

    Species Description - Rhizome creeping, filiform, wiry, loosely clothed with short, brown, pluricellular hairs. Fronds widely-spaced, dark green, erect pr decurved; stipes 1-3 cm long, dark brown, narrowly marginate, bearing scattered brown pluricellular hairs; similar hairs along the rhachis. Blades linear- oblong to narrowly ovate-oblong, mostly 5-12 cm long, 1.5-4 cm broad, acute to acuminate at the apex, pinnate-pinnatifid, with a narrowly winged rhachis. Pinnae 6-13 pairs, altemate, obliquely spreading, decurrent, deeply pinnatisect with the lower segments often forked. Ultimate segments linear-oblong, 1-1.5 mm broad, rounded or retuse at apex, the margins sharply denticulate. Sori confined to the upper pinnae, often solitary on basal acroscopic segments; involucre elliptic or ovate-elliptic, 2.5-3.5 mm long, the valves denticulate to fimbriate-lacerate at the apex and free nearly to the base; receptacle usually included. Fertile segments often prolonged beyond the attachment ofthe sorus on one side, so that the sorus appears to be lateral on the segment.

  • Discussion

    Basionym. Trichomanes fucoides Swartz, Prodr. 136. 1788.

    Type. Swartz, from Jamaica without exact locality (S, photo US; isotype Herb. Willd. 20227-1, B, photos G H , US).

    Syn. Leptocionium fucoides (Swartz) K. Presl, Hymenophyllaceae. 27. 1843.

  • Distribution

    General Distribution. Greater and Lesser Antilles

    West Indies|