Trichomanes bucinatum Mickel & Beitel
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Authority
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
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Family
Hymenophyllaceae
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Scientific Name
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Description
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Species Description - Rhizomes slender, 0.3 mm diam., long-creeping; rhizome hairs dense, dark brown to black, 0.5 mm long; roots absent; fronds 1.5–4 cm long, distant; stipes ca. 1/10–1/4 the frond length, 0.5 mm wide, flattened, alate to base or nearly so, with dark brown to black hairs 0.3–0.5 mm long; blades irregularly pinnatifid, some linear, 0.5–2 cm wide, with short lobes, others with pinnae of differing lengths, broader towards the blade apices, to 2 cm wide, margins entire with both forked and stellate hairs, many near pinna tips; rachises broadly adnate; veins free, many unconnected false veins parallel to true veins, with scattered short, clavate hairs 0.1 mm long; sori 1-several per blade; involucres strongly exserted, stalk 0.5–1 mm long, 3 x 0.8 mm, each with large, bilabiate mouth, lips 1 x 1 mm wide, with dark margins of several rows of cells.
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Discussion
Type. Mexico. Oaxaca: Distrito Ixtla´n, trail from San Pedro Nolasco N to the Llano Verde, Mickel 4394 (NY!).
Unverified, Doubtful, or Mistaken Reports. Ver (Pringle 10809, XAL, cited by Palacios-Rios, 1992, but specimen is T. reptans). The variable pinnatifid fronds (some narrowly lanceolate to linear with reduced proximal pinnae), some stellate hairs at the pinna tips, and the strongly exserted involucres with long lips separate this species from other members of sect. Didymoglossum (T. petersii, T. ovale, T. hymenoides, and T. reptans). It resembles T. reptans most closely.