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 short-creeping, to 3 mm diam.; rhizome scales lanceolate to ovate, concolorous light brown, not resinous, to 3 mm long, entire; fronds clumped, 55–62 x 2.2–4 cm; phyllopodia very short, indistinct; stipes nearly absent, only 1–2 cm long, with minute, stellate, appressed hairs; blades narrowly elliptic, very thin, apices acuminate, bases narrowly cuneate, long-decurrent nearly to the rhizomes; veins evident, free, simple or once-forked, but vein tips expanded laterally, sometimes uniting, at 75º angle to costa; hydathodes absent; blade scales absent, but minute, stellate, reddish, resinous hairs present, mostly on the abaxial surfaces; fertile fronds shorter than the sterile, 40–46 cm long, stipe 1/3–1/2 the fertile frond length, blades 1.2–1.6 cm wide, intersporangial scales absent.
Species Description - Rhizomes short-creeping, to 3 mm diam.; rhizome scales lanceolate to ovate, concolorous light brown, not resinous, to 3 mm long, entire; fronds clumped, 55–62 x 2.2–4 cm; phyllopodia very short, indistinct; stipes nearly absent, only 1–2 cm long, with minute, stellate, appressed hairs; blades narrowly elliptic, very thin, apices acuminate, bases narrowly cuneate, long-decurrent nearly to the rhizomes; veins evident, free, simple or once-forked, but vein tips expanded laterally, sometimes uniting, at 75º angle to costa; hydathodes absent; blade scales absent, but minute, stellate, reddish, resinous hairs present, mostly on the abaxial surfaces; fertile fronds shorter than the sterile, 40–46 cm long, stipe 1/3–1/2 the fertile frond length, blades 1.2–1.6 cm wide, intersporangial scales absent.
Discussion:
Type. Mexico. Oaxaca: Distrito Ixtla´n, 29 km S of Valle Nacional, 80 km N of Ixtla´n de Jua´rez, trail E of Rte 175 at Campamento Vista Hermosa toward Ladu´, 1 hour hike down to Ri´o de la Trucha, Mickel 6417 (NY!; isotypes ENCB!, NY!, UC!).
Elaphoglossum decursivum closely resembles E. lonchophyllum in its slender rhizomes, minute stellate hairs on stipes and blades, thin blades, and the vein tips laterally extended and sometimes uniting, but the former differs in the lack of resinous rhizome scales and the virtually sessile fronds.
Distribution:
Belize Central America| Honduras Central America| Canal Zone Panamá Central America| México Mexico North America|
Belize Central America| Honduras Central America| Canal Zone Panamá Central America| México Mexico North America|