Hymenophyllum sieberi Bosch

  • 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 sieberi Bosch

  • Description

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    Species Description - Rhizome finely wiry, pubescent. Fronds pendent, of indeterminate growth; stipes 1.5-8 cm long, 0.4-0.5 mm in diam., winged above the middle, deciduously pubescent, the hairs simple, forked, and stellate. Blades oblong to linear-elongate, 12-30(-50) cm long, 2.5-8 cm broad; rhachis winged throughout, the wings less than 1 mm wide; pinnae up to 25 or more on a side, altemate or subopposite, close or somewhat overlapping, broadly lanceolate, 2-5 cm long, up to 1.8 cm broad, acuminate, pinnatifid with lobed segments or sometimes nearly 2-pinnatifid; ultimate segments mostly not more than 1 mm long, less than 1 mm broad, the hairs of veins and tissue few, stellate, subsessile, the marginal hairs forked or stellate, relatively long-stalked, or a few bistellate. Sori about as wide as the fertile segments, the valves rounded, to 1.5 mm long, bearing longstalked forked or stellate hairs along the outer margins.

  • Discussion

    Basionym. Sphaerocionium sieberi K, Presl, Hymenophyllaceae 58. 1844.

    Type. Kohaut, from Martinique {Sieber exsicc. 71, not seen).

    Syn. Hymenophyllum interruptum of Duss, Div. foug. Antill. fran?. 8. 1903, not Kunze, 1834.

  • Distribution

    General Distribution. Puerto Rico, Lesser Antilles,

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