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FNA | Family List | FNA Vol. 2 | Pteridaceae | Notholaena

3. Notholaena aliena Maxon, Contr. U.S. Natl. Herb. 17: 605. 1916.

Chrysochosma aliena (Maxon) Pichi-Sermolli

Stem scales concolored to weakly bicolored, margins usually brown, very narrow and poorly defined, thin, ciliate-denticulate. Leaves 5--15 cm. Petiole brown, equal to or shorter than blade, rounded adaxially, glandular-farinose, bearing scattered hairs and scales. Blade linear-lanceolate, 2-pinnate-pinnatifid, 3--6 times longer than wide, abaxially with conspicuous cream-colored or pale yellow farina and dull, light brown, narrowly lanceolate, ciliate scales scattered along rachises and costae, adaxially sparsely glandular and villous with long, multicelled, whitish hairs; basal pinnae equal to or slightly larger than adjacent pair, ± equilateral, proximal basiscopic pinnules not greatly enlarged. Ultimate segments sessile, broadly adnate to costae; segment margins slightly recurved, rarely concealing sporangia. Sporangia containing 16 spores.

Sporulating summer--fall. Rocky slopes and cliffs, usually on volcanic substrates; 700--1200 m; Tex.; Mexico.

Notholaena aliena is a rare species closely related to N . grayi . Preliminary studies indicate that N . aliena reproduces by apogamy and is probably triploid.


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