Monographs Details:
Authority:
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Family:
Dryopteridaceae
Dryopteridaceae
Description:
Species Description - Rhizomes very long-creeping, ca. 3 mm diam.; rhizome scales ovate, pale brown, black at peltate attachment, mostly 3–4 mm long, entire, somewhat deciduous, leaving mostly naked rhizomes; fronds 2–4 cm apart, to 38 x 2.5–3.5 cm; phyllopodia distinct, 1.5–3 cm long; stipes 1/3–1/2 the frond length, with scattered ovate scales similar to those of rhizomes and minute, black, appressed, stellate hairs; blades lanceolate to narrowly elliptic, coriaceous, bases broadly cuneate, apices acute; veins obscure, free, simple or once-forked, ca. 1 mm apart, at ca. 70º angle to costa; hydathodes absent; blade surfaces nearly glabrous with minute stellate hairs and a few broader scales on the costae, especially on the abaxial surfaces; fertile fronds slightly to much longer than the sterile fronds, the stipes longer (1/2–2/3 the frond length) and the blades slightly narrower, scales absent throughout.
Species Description - Rhizomes very long-creeping, ca. 3 mm diam.; rhizome scales ovate, pale brown, black at peltate attachment, mostly 3–4 mm long, entire, somewhat deciduous, leaving mostly naked rhizomes; fronds 2–4 cm apart, to 38 x 2.5–3.5 cm; phyllopodia distinct, 1.5–3 cm long; stipes 1/3–1/2 the frond length, with scattered ovate scales similar to those of rhizomes and minute, black, appressed, stellate hairs; blades lanceolate to narrowly elliptic, coriaceous, bases broadly cuneate, apices acute; veins obscure, free, simple or once-forked, ca. 1 mm apart, at ca. 70º angle to costa; hydathodes absent; blade surfaces nearly glabrous with minute stellate hairs and a few broader scales on the costae, especially on the abaxial surfaces; fertile fronds slightly to much longer than the sterile fronds, the stipes longer (1/2–2/3 the frond length) and the blades slightly narrower, scales absent throughout.
Discussion:
Type. Mexico. Oaxaca: Distrito Mixe, SE shoulder of Cerro Zempoalte´petl, below Patio de Arena, Mickel 4908 (NY!; isotypes MEXU!, UC!).
Elaphoglossum seminudum is close to E. lingua (Raddi) Brack. of Central and South America and theWest Indies, but has more slender blades, and tan, rather than black, rhizome scales.