2. Macrothelypteris (H. Itô) Ching, Acta Phytotax. Sin. 8: 308. 1963.
[Greek makros, large, thelys, female, and pteris, fern]
Alan R. Smith
Thelypteris Schmidel sect. Macrothelypteris H. Itô in Nakai & Honda, Nov. Fl. Jap. 4: 141. 1938; Thelypteris Schmidel subg. Macrothelypteris (H. Itô).
Stems short-creeping, thick, 1 cm diam. Blades 2-pinnate-pinnatifid nearly throughout, broadest at base, apex gradually reduced; pinnae pinnate-pinnatifid, sessile or stalked, not connected by wing along rachis; costae not grooved adaxially; buds absent; veins free, often forked, tips not reaching margin; rachises and costae lacking scales; indument abaxially of unbranched, septate hairs mostly over 1 mm. Sori round, medial to supramedial; indusia small, less than 0.3 mm diam., often obscured in mature sori; sporangial capsules bearing short-stalked glands. x = 31.
Species ca. 10 (1 introduced in the flora): tropical and subtropical regions, North America, Asia, Africa, Pacific Islands, Australia in Queensland.
Holttum, R. E. 1969. Studies in the family Thelypteridaceae. The genera Phegopteris, Pseudophegopteris, and Macrothelypteris. Blumea 17: 5--32. Leonard, S. W. 1972. The distribution of Thelypteris torresiana in the southeastern United States. Amer. Fern J. 62: 97--99.