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 to 4 mm diam., short- to moderately creeping; rhizome scales 8 mm long, linear, reddish orange, lustrous, with long hair-teeth; fronds 24–30 cm, approximate to slightly distant; phyllopodia inconspicuous or absent; stipes 1/2 of sterile frond length, orange-tan; stipe scales mostly 3–5 mm long, lanceolate, spreading, orange or with black centers, strongly ciliodenticulate, the shorter ones with longer hair-teeth; sterile blades 6–15 x 2–4.2 cm, narrowly elliptic or lanceolate, subcoriaceous, bases broadly cuneate, apices obtuse; veins obscure, c. 1.5 mm apart, at 60–70º angle to costa; hydathodes absent; blade scales mostly 1.5–3 mm long, abundant, cilio-denticulate, adaxially whitish with age, imbricate to deciduous, abaxially orange with some lamina visible between the scales; fertile fronds slightly longer than the sterile, stipes 2/5 of frond length, blades narrower than those of sterile fronds, scales abundant adaxially and on abaxial costa, intersporangial scales conspicuous and abundant or deciduous, with long hair-teeth.
Species Description - Rhizomes to 4 mm diam., short- to moderately creeping; rhizome scales 8 mm long, linear, reddish orange, lustrous, with long hair-teeth; fronds 24–30 cm, approximate to slightly distant; phyllopodia inconspicuous or absent; stipes 1/2 of sterile frond length, orange-tan; stipe scales mostly 3–5 mm long, lanceolate, spreading, orange or with black centers, strongly ciliodenticulate, the shorter ones with longer hair-teeth; sterile blades 6–15 x 2–4.2 cm, narrowly elliptic or lanceolate, subcoriaceous, bases broadly cuneate, apices obtuse; veins obscure, c. 1.5 mm apart, at 60–70º angle to costa; hydathodes absent; blade scales mostly 1.5–3 mm long, abundant, cilio-denticulate, adaxially whitish with age, imbricate to deciduous, abaxially orange with some lamina visible between the scales; fertile fronds slightly longer than the sterile, stipes 2/5 of frond length, blades narrower than those of sterile fronds, scales abundant adaxially and on abaxial costa, intersporangial scales conspicuous and abundant or deciduous, with long hair-teeth.
Discussion:
Acrostichum engelii H. Karst., Fl. Columb. 1: 119, t. 59. 1860. Type. Colombia. Karsten s.n. (LE).
Elaphoglossum engelii is closely allied to E. muscosum, but distinct by the hair-toothed rhizome scales and fringed (especially the larger scales) vs. erose to short-toothed stipe scales.