绿叶对囊蕨 lü ye dui nang jue

Asplenium viridifrons Makino, Bot. Mag. (Tokyo) 13: 15. 1899; Athyrium henryi (Baker) Diels var. viridifrons (Makino) Ohwi; Cornopteris viridifrons (Makino) Tardieu; Dryoathyrium viridifrons (Makino) Ching; Lunathyrium viridifrons (Makino) Sa. Kurata; Parathyrium viridifrons (Makino) Holttum.

Rhizomes creeping, moderately stout. Fronds approximate; fertile fronds up to 1.2 m; stipe upward stramineous, 35-55 cm, 3-4 mm in diam. at base, base with sparse brownish broadly lanceolate scales, upper part glabrate; lamina 3-pinnatipartite, deltoid-ovate or ovate-lanceolate, 40-65 × 30-55 cm, base hardly narrowed and rounded-cuneate, apex acuminate; pinnae 8-10 pairs, alternate but basal pair subopposite, stalked, ascending, oblong, large pinnae 22-30 × 10-15 cm at middle, base truncate, apex acuminate; pinnules 12-14 pairs, alternate, subsessile, continued to narrow costal wing, subspreading, lanceolate, deeply pinnatifid; segments 10-12 pairs, alternate, ascending, rectangular, 6-12 × 2.5-3.5 mm, crenate, obtuse-rounded at apex. Veins pinnate in segment, lateral veins simple or forked. Lamina herbaceous when dried, green, rachis, costae, and costules with sparse brownish lanceolate small scales and scalelike vermiculate hairs. Sori small, orbicular or rotund, abaxial; indusia brown, orbicular-reniform, membranous, subentire or laciniate, persistent. Perispore with many folds irregularly rugate. 2n = 80.

Forests, near forest margins; 300-2100 m. Fujian, Guizhou, Hunan, Jiangxi, Sichuan, Yunnan, Zhejiang [Japan, Korea].