微红新月蕨 wei hong xin yue jue

Polypodium megacuspe Baker, J. Bot. 28: 266. 1890; Abacopteris sampsonii (Baker) Ching; P. sampsonii Baker; Pronephrium sampsonii (Baker) Ching ex K. H. Shing.

Plants 50-70 cm tall. Rhizomes creeping, blackish brown, with dense hooked hairs and hairy brown lanceolate scales. Fronds remote; stipes 25-35 cm, stramineous, sparsely hairy at bases, distally sparsely setaceous; laminae oblong, 25-35 × ca. 30 cm, slightly narrowed to bases, 1-imparipinnate, caudate-pointed at apices; lateral pinnae 5 or 6 pairs, alternate, proximal pair slightly shortened, shortly stalked, others sessile, oblique distally, lanceolate, 12-14 × ca. 2.5 cm, cuneate at bases, entire or undulate, caudate-acuminate at apices; terminal pinna of similar shape as lateral ones, but very large, stalk 2-4 mm. Veins evident, veinlets oblique distally and parallel, veinlets subobliquely spreading and forming triangular areoles at bases between veinlets, distally forming a line of V-shaped areoles, with an expanded hydathode at excurrent vein arising from joining point. Laminae papery when dry, reddish, abaxial surface with more hooked hairs along and short hairs when young, fallen when old and with few remaining on rachises and veins only. Sori attached above middle of veinlets and confluent when mature and forming a horizontal, equidistant row between veinlets, exindusiate; sporangia bearing hairs when young.

Dense forests, along streams, wetlands; 100-400 m. Guangdong, Guangxi, Jiangxi, S Taiwan, Yunnan [Japan, Thailand, Vietnam].