Rumohra adiantiformis (G.Forst.) Ching

  • Authority

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

  • Family

    Dryopteridaceae

  • Scientific Name

    Rumohra adiantiformis (G.Forst.) Ching

  • Description

    Species Description - Rhizome long-creeping, tortuous, flattish, ca. 1.5 cm thick, densely clothed with thin, yellowbrown, lanceolate scales up to 15 mm long and 4 mm broad below the middle, the tips tortuous-attenuate, the margins entire. Fronds varying greatly in size (depending on conditions of growth and exposure), 20-150 cm long, the deeplytortuous- grooved, straw-colored stipes usually shorter grooved, straw-colored stipes usually shorter the blades, nearly naked or with a few scattered linear scales. Blades 15-90 cm long, 10-75 broad at the base; rhachis and costate doubly grooved adaxially, the costal grooves continuous with those of rhachis; pinnae stalked, the basal ones much the largest, unequafly deltate, long-acuminate; ultimate pinnules lance-elliptic to ovate-oblong from an unequal, cuneate base, acutish at apex, the larger ones obliquely incised, the smaller bluntly serrate. Sori large, slightly inframedial.

  • Discussion

    Fig. 79.

    Basionym. Polypodium adiantiforme G. Forster, Prodr. Fl. Ins. Austr. 82. 1786. Type. G. Forster, from New Zealand (BM).

    Syn. Polypodium coriaceum Swartz, Prodr. 133. 1788. (Type. Swartz, from Jamaica, isotype Herb. Thunb. 24647, UPS.)

    Aspidium coriaceum (Swartz) Swartz, J. Bot. (Schrader) 1800(2): 36. 1802.

    Aspidium capense Willdenow in Linnaeus, Sp. pl. 5: 267. 1810, not Swartz, 1802.

    Tectaria coriacea (Swartz) Link, Hort. Berol. 2: 127. 1833.

    Hypopeltis coriacea (Swartz) Belanger, Voy. Indes Or. 2:70. 1833.

    Polystichum coriaceum (Swartz) Schott, Gen. fil., under t. 9. 1834.

    Polystichum capense J. Smith, Companion Bot. Mag. 72: 35. 1846. (Based on Aspidium capense Willdenow not Swartz.)

    Polystichum adiantiforme (G. Forster) J. Smith, Hist. fil. 220. 1875.

  • Distribution

    General Distribution. Bermuda, Greater Antilles, South America; widely distributed in the Southern Hemisphere tropics and subtropics.

    Bermuda South America| South America|