45. Pteris grevilleana Wallich ex J. Agardh, Recens. Spec. Pter. 23. 1839.
林下凤尾蕨 lin xia feng wei jue
Plants 20-45 cm tall. Rhizome erect, short, 0.5-1 cm in diam., apex with black-brown scales. Fronds clustered (10-15 per plant), monomorphic; stipes of fertile fronds ca. 2 × as long as those of sterile fronds, castaneous-brown, shiny, 20-30 cm × 1-1.5 mm, glabrous, with narrow wings apically; rachis similar, adaxially grooved and with narrow wings; lamina 2-pinnatipartite, broadly ovate-triangular, 10-15 × 8-12 cm; lateral pinnae 1 or 2 pairs, opposite, decumbent, sessile, in shape of apical lateral pinnae but shorter, base decrescent to narrow wings; basal pinnae 2-forked, basiscopic pinnule smaller; fertile pinnae similar to sterile pinnae, but segments shorter and fewer; terminal pinna broadly lanceolate, 8-12 × 2.5-3.5 cm, base decurrent, connate below pinnae, pectinately divided nearly to costae on both sides, apex caudate; segments decumbent, contiguous, falcate-linear to lanceolate, 15-20 × 3-4 mm, margins serrulate, apex obtuse; lower segments shorter; costae adaxially convex, basally castaneous-brown, upper straw-colored, shallowly grooved, with acute spines (ca. 0.8 mm) on both sides; veins inconspicuous, parallel, very decumbent, often 2-forked, occasionally 3-forked; lamina pale green, firmly herbaceous when dried, glabrous, both surfaces with short raised false veins between veins.
Among rocks within forests; 100-900 m. Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Bhutan, N India, Indonesia, Japan (Ryukyu Islands), Malaysia, Nepal, Philippines, Thailand, Vietnam].