Asplenium fenzlianum Luerss.; Athyrium fenzlianum (Luerss.) 0. Deg. & I. Deg.; Diplazium fenzlianum (Luerss.) C. Chr.

Endemic

Name honors Eduard Fenzl (1808-1879), Austrian botanist who was curator of collec-tions in the Vienna Botanical Museum, professor of botany, and director of the botanical garden.

Plants medium-sized, terrestrial. Rhizomes decumbent to erect. Fronds 40-75 x 18-30 cm, never proliferous. Stipes straw-colored, bases heavily clothed with persistent long, linear-lanceolate, dark brown to black scales. Blades 1-pinnate-pinnatifid, oblong-lanceolate, chartaceous, acuminate; rachises glabrous. Pinnae pairs 16-30, nearly sessile to short-stalked, linear, 9-15 x 1.5-4 cm, basal pinnae not to somewhat shorter, sinuses cut 1/4-9/10 to costae, lobes oblique, obtuse to shallowly serrate to dentate, costae and veins hairy, tips acuminate. Veins free. Sori medial to submarginal, linear, single, except sori closest to costae in pairs, back to back. Indusia tan, thin.

Locally common in mesic forests, 380-1,010 m, all major islands, rare on Kaua 'i.

Deparia fenzliana may be distinguished from other Hawaiian Deparia by naked rachises, stipes heavily clothed with long, black scales at the base and naked distally, and lack of proliferations.