Monographs Details:
Authority:
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Mickel, John T. & Beitel, Joseph M. 1988. Pteridophyte Flora of Oaxaca, Mexico. Mem. New York Bot. Gard. 46: 1-580.
Family:
Polypodiaceae
Polypodiaceae
Description:
Species Description - Rhizome long-creeping, 1-2 mm diam.; rhizome scales 1-2 mm long, concolorous, brown, lanceolate, entire; fronds monomorphic to subdimorphic, coriaceous; stipe 1/10-1/3 the frond length, stramineous; blade lanceolate, 12-22 cm long, 8-22 mm wide, apex acute to acuminate, base cuneate; rachis with scattered lanceolate scales 1-2 mm long, lower surface with sparse round scales (0.3 mm diam.) and rare lanceolate scales (1 mm long), margin fimbriate; veins anastomosing, immersed on lower surface; sori round, slightly sunken, with dense, filiform scales branching from the base into several reddish-brown hairlike segments, nearly obscuring sporangia.
Species Description - Rhizome long-creeping, 1-2 mm diam.; rhizome scales 1-2 mm long, concolorous, brown, lanceolate, entire; fronds monomorphic to subdimorphic, coriaceous; stipe 1/10-1/3 the frond length, stramineous; blade lanceolate, 12-22 cm long, 8-22 mm wide, apex acute to acuminate, base cuneate; rachis with scattered lanceolate scales 1-2 mm long, lower surface with sparse round scales (0.3 mm diam.) and rare lanceolate scales (1 mm long), margin fimbriate; veins anastomosing, immersed on lower surface; sori round, slightly sunken, with dense, filiform scales branching from the base into several reddish-brown hairlike segments, nearly obscuring sporangia.
Discussion:
Polypodiumpercussum Cavanilles, Descr. pl. 243. 1802. Pleopeltis percussa (Cavanilles) Hooker & Greville, Icon fil. 1: t. 67. 1828. Type. Peru [incorrectly stated as Mariannas by Cavanilles]. Nées.n. (MA, seen and commented on by Christensen, Dansk Bot. Ark. 9(3): 11. 1937). See discussion under generic description. Microgramma percussa is distinct by its sori with dense cushion of hairlike scales, small round abaxial blade scales and coriaceous blade, usually with acuminate apex.
Polypodiumpercussum Cavanilles, Descr. pl. 243. 1802. Pleopeltis percussa (Cavanilles) Hooker & Greville, Icon fil. 1: t. 67. 1828. Type. Peru [incorrectly stated as Mariannas by Cavanilles]. Nées.n. (MA, seen and commented on by Christensen, Dansk Bot. Ark. 9(3): 11. 1937). See discussion under generic description. Microgramma percussa is distinct by its sori with dense cushion of hairlike scales, small round abaxial blade scales and coriaceous blade, usually with acuminate apex.
Distribution:
Mexico North America| Brazil South America| Bolivia South America| Suriname South America| Colombia South America| Panama Central America| Guatemala Central America|
Mexico North America| Brazil South America| Bolivia South America| Suriname South America| Colombia South America| Panama Central America| Guatemala Central America|