牟氏辐禾蕨 mu shi fu he jue

Type: China. Taiwan: Taidong, Lan Yu, Mt. Hungtou, 22°03′N 121°32′E, 400-500 m, 8 Aug 2004, Shih-Wen Chung 7242 (holotype, TAIF! [herbarium no. 211637]).

Radiogrammitis moorei has tufted marginal hairs similar to those of R. jagoriana (Mettenius ex Kuhn) Parris, but it differs in having hydathodes at the vein endings and much shorter stipe hairs.

Rhizome with scales. Stipe less than 1 cm, with dense dark reddish brown simple solitary and tufted hairs 0.1-0.2 mm. Lamina narrowly oblanceolate, 3.7-7 × 0.4-0.7 cm, base long attenuate, margin entire, apex bluntly acute; midrib slightly prominent abaxially, slightly prominent to prominent adaxially, concolorous with lamina on both sides; lateral veins invisible, 1-forked, acroscopic branch extending beyond sorus, ± as long as basiscopic branch, ending with a pale hydathode; hairs dark reddish brown, solitary on both surfaces of lamina, solitary and tufted on both sides of midrib and on margin, not of 2 lengths, scattered to dense on abaxial surface, dense on margin, sparse to scattered on adaxial surface, 0.1-0.8 mm. Sori broadly elliptic, slightly sunken, adjacent to midrib, not extending more than halfway to margin. Sporangia setose.

● Epiphytic on tree trunks in wet broad-leaved forests; 400-600 m. Taiwan.

Material of this species has been misidentified as Grammitis fenicis Copeland. For more details, including keys, see Knapp (Ferns Fern Allies Taiwan, 240, 245, 458, 747-748. 2011).