3. Phegopteris (C. Presl) Fée, Mém. Foug. 5: 242. 1852.
Beech fern [Greek phegos, beech, and pteris, fern]
Alan R. Smith
Polypodium Linnaeus sect. Phegopteris C. Presl, Tent. Pterid., 179. 1836; Thelypteris Schmidel subg. Phegopteris (C. Presl) Ching
Stems long-creeping, 1--4 mm diam. Blades 2--3-pinnatifid in proximal part, broadest at base, apex gradually reduced; pinnae deeply lobed, mostly strongly adnate, connected by wing along rachis, wing sometimes forming lobe between pinnae and served by vein arising from rachis; costae not grooved adaxially; buds absent; veins free, simple or often forked, distal veins of segment reaching margin or nearly so; indument abaxially of unbranched, unicellular hairs, rachises and costae also with spreading, ovate-lanceolate scales. Sori round to oblong, supramedial to inframarginal, lacking indusia; sporangial capsule often bearing stalked glands or hairs. x = 30.
Species 3 (2 in the flora): north temperate and boreal, 1 in temperate e Asia.
Holttum, R. E. 1969. Studies in the family Thelypteridaceae. The genera Phegopteris, Pseudophegopteris, and Macrothelypteris. Blumea 17: 5--32.