Grammitis hessii (Maxon) Alain

  • Authority

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

  • Family

    Polypodiaceae

  • Scientific Name

    Grammitis hessii (Maxon) Alain

  • Description

    Species Description - Rhizome short, erect, at apex bearing a tuft of dark brown, glabrous, narrowly lance-linear scales mostly 2-3 mm long. Fronds few, loosely tufted, usually short-stipitate; blades ligulate, 4.5-18 cm long, 5-9 mm broad, tapering and blunt or acutish at apex, long-decurrent at base, at first with scattered, very minute, branched, articulate hairs along margins and abaxial side of costa, eventually glabrous; sterile veins oblique, simple, not reaching the margins, ending in adaxial hydathodes; fertile veins each with a short linear, inframedial, acroscopic spur giving rise to a sorus. Sori roundish-oval, touching the costa at maturity; sporangia glabrous.

  • Discussion

    Fig. 100.

    Basionym. Polypodium hessii Maxon, Bull. Torrey Bot. Club 42: 223. 1915.

    Type. Hess 312, from Sierra de Naguabo, Puerto Rico (US) (apparently = Shafer 2328, US, collected same time & place).

  • Distribution

    General Distribution. Puerto Rico and St. Vincent.

    Puerto Rico South America| Saint Vincent and the Grenadines South America|