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:
Dryopteridaceae
Dryopteridaceae
Description:
Species Description - Rhizome short- to moderately creeping, 1-2 mm diam.; rhizome scales dense to sparse, ovate, orange or tan with varying degrees of dark, lustrous, sclerotic streaking, ca. 3 mm long, deeply cordate, appearing nearly peltate, entire or with occasional small, irregular teeth; phyllopodia distinct; fronds 1-8 mm apart, 6-23 cm long, 0.6-1.0 cm wide; stipe ¼-2/3 the frond length, glabrous or with tan, ovate scales; blade linear-elliptic, chartaceous, apex acuminate, base attenuate; veins obscure, free, simple or once-forked, ca. 1 mm apart, at 60-70° angle; hydathodes lacking; blade scales sparse, minute stellate hairs or dots on lower surface, rare on upper surface; fertile fronds similar to the sterile in size and shape or occasionally slightly longer, scales lacking on lower surface; spores with low ridges or small narrow crests.
Species Description - Rhizome short- to moderately creeping, 1-2 mm diam.; rhizome scales dense to sparse, ovate, orange or tan with varying degrees of dark, lustrous, sclerotic streaking, ca. 3 mm long, deeply cordate, appearing nearly peltate, entire or with occasional small, irregular teeth; phyllopodia distinct; fronds 1-8 mm apart, 6-23 cm long, 0.6-1.0 cm wide; stipe ¼-2/3 the frond length, glabrous or with tan, ovate scales; blade linear-elliptic, chartaceous, apex acuminate, base attenuate; veins obscure, free, simple or once-forked, ca. 1 mm apart, at 60-70° angle; hydathodes lacking; blade scales sparse, minute stellate hairs or dots on lower surface, rare on upper surface; fertile fronds similar to the sterile in size and shape or occasionally slightly longer, scales lacking on lower surface; spores with low ridges or small narrow crests.
Discussion:
Acrostichum tenuifolium Liebmann, Mexic. bregn. 163 (seors. 11). 1849. Type. Mexico. Oaxaca: Cerro Zempoaltépetl, Liebmann [Pl. Mex. 2654] (C!). Although the general habit and the dark streaking of the rhizome scales are similar to those of E. affine and E. alan-smithii, this species can be distinguished by its narrow blade and generally shorter rhizome length. See comments under those species.
Acrostichum tenuifolium Liebmann, Mexic. bregn. 163 (seors. 11). 1849. Type. Mexico. Oaxaca: Cerro Zempoaltépetl, Liebmann [Pl. Mex. 2654] (C!). Although the general habit and the dark streaking of the rhizome scales are similar to those of E. affine and E. alan-smithii, this species can be distinguished by its narrow blade and generally shorter rhizome length. See comments under those species.
Distribution:
Mexico North America| Guatemala Central America|
Mexico North America| Guatemala Central America|