Monographs Details: Trichomanes hymenoides Hedw.
Authority: Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.
Family:Hymenophyllaceae
Description:Species Description - Rhizome filiform, intricately wide-creeping, forming mats, clothed with minute, blackish brown, hairlike rhizoids. Fronds extremely variable, even on the same plant, nearly sessile or with stipes up to 6 mm long; stipes (if present) usually covered with hairlike rhizoids like those of rhizome. Blades mostly 0.5-2 cm long, 0.3-1.5 cm broad, oblong to roundish or reniform, the base cuneate, rounded or cordate, the margins more or less regularly lobed or pinnatifid, the marginal hairs short, dark brown, stiffly recurved, and mostly forked at the base; veins few, subflabellate but with a distinct percunent costa to the apex, the side veins altemate, pinnately branched, the tissue between containing a few delicate false veins. Sori few (1-6), on apical lobes; involucres flattened-turbinate, 1.5-2.5 mm long, free or but slightly immersed; mouth broadly 2-lipped, the lips circular, somewhat flaring, dark marginate, the marginal band often consisting of a blackish line 1 cell wide at edge, then a brown zone 3-7 cells wide.

Discussion:

Type. Hedwig, t. 6, fig. 3 (as cited above), designated by Wessels Boer (1962), based on material from an unknown locality, perhaps Jamaica. Morton (1967) thought that Swartz, from Jamaica, Herb. Willd. 20188 (B) might be an isotype.

Syn. Trichomanes muscoides Swartz, J. Bot. (Schrader) 1800(2): 95. 1802 (nomen superfl.), (Type. Swartz, from Jamaica, S, isotype SBT.)

Didymoglossum hymenoides (Hedwig) Desvaux, Mem. Soc. Linn. Paris 6: 330. 1827.

Didymoglossum muscoides (Swartz) Desvaux, ibid.

Hemiphlebium hymenoides (Hedwig) Prantl, Unters. Morph. Gefasskrypt. 1: 46. 1875.

Hemiphlebium muscoides (Swartz) Prantl, ibid.

Distribution:West Indies| Trinidad and Tobago South America| Mexico North America| Central America| Colombia South America| Ecuador South America| Peru South America|