Trichomanes ovale (E.Fourn.) Wess.Boer
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Authority
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
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Family
Hymenophyllaceae
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Scientific Name
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Description
Species Description - Rhizome long-creeping, slender, 0.1 mm diam.; rhizome hairs dark brown, 0.1 mm long; roots lacking; fronds 0.3-0.8 cm long, 0.2-0.4 cm wide, distant; stipe 1-4 mm long, ¼-½ the frond length, with hairs similar to those of rhizome; blade ob-ovate to narrowly oblanceolate, occasionally shallowly to deeply lobed, apex rounded, base cuneate to cordate, margin membranaceous, with sparse, reddish-brown, stellate hairs; veins pinnate to flabellate, free, false veins parallel to the true veins; sori one per blade, immersed to partly exserted; involucre tubiform with bilabiate lips, dark-margined with a few rows of darkened cells.
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Discussion
Didymoglossum ovale Fournier, Bull. Soc. Bot. France 19: 240. 1872. Lectotype (chosen by W. Boer, 1962: 296). Venezuela. Tovar, Fendler 25 (P; isotypes B, G, GH, MO). Trichomanes ovale is closely related to Trichomanes petersii in being small, lacking submarginal vein and possessing stellate marginal hairs. The variable fronds (some narrowly lanceolate, some variously lobed), some stellate hairs at the tips of pinnae, and the strongly exserted sori with wide lips separate this species from other members of section Didymoglossum.
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Distribution
Epiphytic in montane rain forest; Juchitán; 150 m. Mexico (Oax, Chis, Tab); Guat to Pan; Gr Antill; Ven, Braz. Oaxaca collection: 6870.
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