Mickel, John T. & Smith, Alan R. 2004. The pteridophytes of Mexico. Mem. New York Bot. Gard. 88: 1-1054.
Dryopteridaceae
Species Description - Rhizomes short-creeping to ascending, ca. 3 mm diam.; rhizome scales linear, maroon, to 8 mm long, with short teeth; fronds clumped, 7–40 x 1.5–4 cm; phyllopodia absent; stipes 1/2–3/4 the frond length, with scales orange to maroon, subulate, widespreading, 2–3 mm long, also with a few minute erect glandular hairs; blades ovate to ovate-lanceolate, chartaceous, bases rounded or subcordate, apices cuspidate; veins evident, free, simple or once-forked, ca. 2 mm apart, at 60–70º angle to costa; hydathodes distinct; blade scales subulate, orange to maroon, abundant on abaxial surfaces, few adaxially, especially spreading from the margins, 2–3 mm long; fertile fronds usually slightly shorter than the sterile, the blades more elliptic, to 4.2 x 2.4 cm, stipes to 4/5 the frond length, apices obtuse, blades often folded at the costa, scales on the abaxial midvein but not among the sporangia.
Acrostichum lindenii Bory ex Fe´e, Me´m. Foug. 2: 48, pl. 18, f. 3. 1845. Type (isolectotypes chosen by Mickel in Stolze, 1981: 226). Mexico. Veracruz: Orizaba, Galeotti 6263 (G-DEL; isotypes BR-2 sheets, P!).
Acrostichum pumilum M. Martens & Galeotti, Me´m. Foug. Mexique 23, pl. 2, f. 2. 1842, non Elaphoglossum pumilum H. J. Lam & Verhey ex H. J. Lam, 1945. Type. Mexico. Veracruz: Orizaba, Galeotti 6263 (BR!; isotype P!).
Acrostichum venustum Liebm., Mexic. Bregn. 168 (reprint 16). 1849, non Fe´e, 1857, nec Elaphoglossum venustum T. Moore, 1857. Elaphoglossum liebmannii T. Moore, Index Fil. 360. 1862. Type. Mexico. Veracruz: Orizaba, Liebmann s.n. [Pl. Mex. 2420] (C!; isotypes P!, US!).
Unverified, Doubtful, or Mistaken Reports. Mich (reported by Di´az-Barriga & Palacios-Rios, 1992, referring to Ibarra, 1983, but not verified and doubtful). The plants are usually small but the species is highly variable. It is distinguished by the blade shape, the generally cuspidate blade tips, and the folded fertile blades. It may be mistaken for E. monicae, but the latter has lighter colored blade scales, acuminate blade apices, and echinate spores. Very small specimens of E. lindenii closely resemble plants of E. piloselloides, but the former can be distinguished by blade shape, more evident hydathodes, and higher elevation (confined to Pacific slope).
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