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 compact, short-to moderately creeping, 2-3 mm diam.; rhizome scales linear- lanceolate, dark reddish black, sclerotic, lustrous, ca. 5 mm long, with a few pale, weak hairteeth; fronds clumped to 3 mm apart, 60-80 x 1.7-2.6 cm; phyllopodia indistinct; stipes 1/3-1/2 the frond length, with scales appressed, peltate, round with dark centers and short hairteeth; blades linear-elliptic, chartaceous, bases narrowly cuneate, apices long-acuminate; veins obscure, free, simple or once forked, mostly 0.7-1 mm apart, at ca. 80º angle to costa; hydathodes absent; blade scales on adaxial surfaces white, appressed, round, peltate, toothed, deciduous with age, scales on the abaxial surfaces reduced to stellate hairs; fertile fronds about as long as the sterile or slightly longer, but with narrower blades and longer stipes more than 1/2 the frond length, scales round, peltate on abaxial costae but absent among the sporangia; 2n =164 (Jam).
Species Description - Rhizomes compact, short-to moderately creeping, 2-3 mm diam.; rhizome scales linear- lanceolate, dark reddish black, sclerotic, lustrous, ca. 5 mm long, with a few pale, weak hairteeth; fronds clumped to 3 mm apart, 60-80 x 1.7-2.6 cm; phyllopodia indistinct; stipes 1/3-1/2 the frond length, with scales appressed, peltate, round with dark centers and short hairteeth; blades linear-elliptic, chartaceous, bases narrowly cuneate, apices long-acuminate; veins obscure, free, simple or once forked, mostly 0.7-1 mm apart, at ca. 80º angle to costa; hydathodes absent; blade scales on adaxial surfaces white, appressed, round, peltate, toothed, deciduous with age, scales on the abaxial surfaces reduced to stellate hairs; fertile fronds about as long as the sterile or slightly longer, but with narrower blades and longer stipes more than 1/2 the frond length, scales round, peltate on abaxial costae but absent among the sporangia; 2n =164 (Jam).
Discussion:
Acrostichum tectum Humb. & Bonpl. ex Willd., Sp. Pl., ed. 4, 5(1): 102. 1810. Type. Venezuela. Caripe, Humboldt s.n. (B-Willd. 19520!; isotypes LE!, PHumb.!). Acrostichum elongatum Kunze, Linnaea 9: 31. 1834. Elaphoglossum elongatum (Kunze) T. Moore, Index Fil. 9. 1857. Type. Peru. “Ad Pampayaco, 1829, Herb. Kunze.” Poeppig s.n. (LZ, destroyed).
This species is readily distinguished by the round, peltate scales on the stipes and adaxial blade surfaces and stellate hairs on the abaxial blade surfaces.
Distribution:
Mexico North America| Guatemala Central America| Honduras Central America| Costa Rica South America| Panama Central America| Jamaica South America| Haiti South America| Dominican Republic South America| Colombia South America| Venezuela South America| Ecuador South America| Peru South America| Brazil South America| Bolivia South America|
Mexico North America| Guatemala Central America| Honduras Central America| Costa Rica South America| Panama Central America| Jamaica South America| Haiti South America| Dominican Republic South America| Colombia South America| Venezuela South America| Ecuador South America| Peru South America| Brazil South America| Bolivia South America|