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Additional Resources:

Family:

Dryopteridaceae (Pteridophyta)

Primary Citation:

Amer. Fern J. 77(4): 127. 1987

Accepted Name:

This name is currently accepted.

Description:

by: R.C. Moran, J. Prado, and P.H. Labiak

Lectotype: (designated by Moran et al, 2009): Brazil. Ceará: Serra de Baturité, Sítio Santa Clara, [4º19'44"S, 38º53'06"W], 9 Dec 1937, Eugênio s.n. (US; duplictaes: HBR, RB-n.v.).

Description: Leaves to 1.0-1.5 m long; scales of the petiole bases ca. 1.5 × 0.05-0.07 cm long, linear, sparsely denticulate, brown, slightly twisted, en masse forming a woolly tuft; laminae 1 m long, to 2-pinnate-pinnatifid at base (rarely 1-pinnate-pinnatisect), 1-pinnate-pinnatisect medially; basal pinnae 20-30 cm long, stalks to 1 cm long, inequilateral, pinnules acroscopically not or only slightly reduced toward pinna bases; pinna rachises abaxially non-glandular, glabrous to puberulent, sparsely scaly, hairs 0.1-0.2 mm long, 1-3-celled, scales 1-2 mm long, narrowly lanceolate, brown, denticulate, flat (non-bullate), adaxially non-glandular, pubescent, hairs 0.3-0.4 mm long, 2- or 3-celled, strigose; costules abaxially non-glandular, glabrous to puberulent, hairs 0.1-0.2 mm long, 1-3-celled, scaly, scales ca. 1 mm long, linear to narrowly lanceolate, non-bullate, sparsely denticulate, adaxially puberulous throughout, hairs 0.4-0.5 mm long, 1-3-celled; laminar tissue between veins abaxially non-glandular, glabrous to subglabrous, hairs (when present) ca. 0.2 mm long, 1- or 2-celled, uniseriate scales often present, these appressed, reddish, inconspicuous, adaxially non-glandular, glabrous to sparsely pubescent (often near margins), hairs 0.3-0.4 mm long, 2- or 3-celled; veins visible or obscure on both surfaces, non-glandular, glabrous to sparsely pubescent; lamina margins sparsely to densely ciliate, hairs 0.2-0.4 mm long, 2-3-celled; indusia absent.

Distribution: Endemic to coastal NE Brazil (Alagoas, Bahia, and Pernambuco); 600-700 m.

Comments: Megalastrum eugenii resembles M. grande but differs by the presence of hairs on the costae adaxially. This is the only species that occurs in the northern part of northeastern Brazil.