细口团扇蕨 xi kou tuan shan jue

Trichomanes nitidulum Bosch, Pl. Jungh. 1: 547. 1856; Gonocormus nitidulus (Bosch) Prantl; Microtrichomanes nitidulum (Bosch) Copeland; Sphaerocionium nitidulum (Bosch) K. Iwatsuki.

Plants ca. 3 cm tall. Rhizome creeping, black, filiform, ca. 0.1 mm in diam., with sparse brown downy hairs. Stipes 3-6 mm apart, 2-2.5 cm, slender, nearly wingless. Lamina nearly fan-shaped or obovate, 1-2 × 1.5-2 cm, subglabrous, dichotomously lobed, dissected to base, base shortly cuneate; lobes simple or forked, linear, 0.5-1 cm × 1-2 mm, with a single veinlet, margin entire, apex obtuse to rounded. Sori terminal on lobes; involucres sunken in apices of lobes, obdeltoid.

On tree trunks; 1300-1800 m. Guangxi, Taiwan, Yunnan [Malesia, Sri Lanka, Vietnam].