Monographs Details: Trichomanes capillaceum L.
Authority: Proctor, George R. 1989. Ferns of Puerto Rico and the Virgin Islands. Mem. New York Bot. Gard. 53: 1-389.
Description:Species Description - Rhizome long-creeping, filiform, ca. 0.2 mm in diam., bearing rather numerous brown hairlike rhizoids. Fronds numerous, close or distant but usually closely aggregated by intertwining of the rhizomes, mostly 5-11 cm long; stipes 1-5 cm long, terete and not winged, glabrous. Blades lanceolate, ovate, or oblanceolate, 4-9 cm long, 1-3.5 cm broad, 3- to 4-pinnate, unevenly obtuse at apex, narrowed or attenuate at base, glabrous throughout; rhachis and primary costae not winged; costules narrowly winged toward distal end; ultimate segments narrowly cuneiform, 0.1-0.3 mm broad at the emarginate apex; tissue light green, thinly membranous but somewhat stiff in texture. Sori usually one per pinna (rarely more), terminating proximal segments, usually stalked and free from the leaf tissue; involucre narrowly funnelform, about twice as long as broad, the flaring mouth undulate but not 2-lipped nor darkmarginate; receptacle long-exserted; spores subglobose, densely granular.
Lectotype. Plumier, Traite foug. Amer., t. 99-D,
based on a plant collected by Plumier "en venant
de la Bande du Sud a Leogane," Haiti
(designated by Proctor, 1985).
Syn. Trichomanes tenellum Hedwig, Fil. gen. sp., ad 6, text &figs. 1, la, lb. 1799. (Lectotype. The
cited Hedwig figs.; however, an authentic specimen from Jamaica exists at Fl, photo US.)
Trichomanes trichoideum Swartz, J. Bot, (Schrader)
1800(2): 98. 1802, (A renaming of T. tenellum
Hedwig, cited by Swartz as pusillum in
Trichomanes trichodes Swartz, Fl. Ind. occid. 3:
1741. 1806. (A renaming of T. trichoideum
Vandenboschia capillacea (Linnaeus) Copeland,
Philipp. J. Sci. 67: 53. 1938
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