河口新月蕨 he kou xin yue jue

Plants 40-110 cm tall. Rhizomes long creeping, blackish, woody, with brown lanceolate scales. Fronds remote; stipes 25-60 cm, scaly at bases, distally with acicular hairs, stramineous; laminae broadly ovate or ovate-oblong, 20-50 × 15-30 cm, 1-imparipinnate; lateral pinnae 3-6 pairs, alternate, obliquely spreading, shortly stalked, proximal pair shortened; middle pinnae ovate-lanceolate or narrowly lanceolate, 15-25 × 3-6.5 cm, cuneate at bases, undulate at margins, acuminate at apices; distal pinnae becoming smaller; terminal pinna slight larger than middle ones, not symmetrical at bases, long stalked. Veins not evident adaxially, obviously raised abaxially, costae grooved adaxially, veinlets obliquely spreading and parallel to each other, proximal pair of veinlets forming a triangular areole, next pair joining with excurrent veinlet into subsquare or rectangular areoles. Laminae papery or herbaceous when dry, green, greenish, or grayish green, adaxially with dense appressed setae along grooves of costae, sparsely hairy along veins and veinlets, abaxial surface with acicular hairs and multicellular articulate hairs along veins and intercostal areas, ± foveolate on intercostal areas. Sori orbicular, attached on middle of veinlets and usually confluent when mature; indusia and sporangia densely hairy.

● On slopes or in forests by streams; 100-500 m. Hainan, Yunnan.