朝鲜对囊蕨 chao xian dui nang jue

Athyrium coreanum Christ, Bull. Herb. Boissier, sér. 2, 2: 827. 1902; A. decursivum Yabe; Dryoathyrium coreanum (Christ) Tagawa; Lunathyrium coreanum (Christ) Ching; L. ningshenense Ching.

Rhizomes shortly creeping, ascending or suberect, clothed with brownish, membranous, lanceolate scales at apex and stipe base. Fronds approximate; fertile fronds 60-80(-95) cm; stipe dark brown at base, upward stramineous, 30-40(-47) cm, 3(-4) mm in diam., base swollen, with pneumatophores, upper part gradually sparsely scaly; lamina 2-pinnatipartite to 2-pinnatisect, oblong-ovate, slightly longer than or as long as stipe, 18-25 cm wide, apex pinnatifid-acuminate; pinnae 12-15(-18) pairs, lower pinnae subopposite, slightly shortly stalked or subsessile, oblique; basal 1 or 2 pairs of pinnae slightly shortened, prominently narrowed to base, 4-6 cm apart; middle pinnae lanceolate, 10-15 × (1.5-)3 cm, subtruncate at base, acroscopic base subparallel to costa, basiscopic base slightly cuneate, pinnatipartite or subpinnatisect, apex long acuminate; pinna segments 15(-20) pairs, basal segments of lowest 2 or 3 pairs of pinnae shorter, middle segments oblong, (0.8-)1-1.2(-2) cm × (4-)5 mm, connected by narrow wing, serrate, much separated from each other, obtuse or obtuse-rounded. Veins visible on surfaces, pinnate in segment, lateral veins 6-8 pairs, 2- or 3-forked. Lamina herbaceous when dried, pale green, rachis and costae with sparse brown multicellular long hairs on abaxial side, shorter hairs more sparse on adaxial side. Sori mostly narrowly oblong or lunate, sometimes hooked, abaxial; indusia brownish, thick, bullate, sparsely ciliate at margin. Spores bilateral, surface with few long foldlike processes. 2n = 160, (240).

Valley forests; 700-1000 m. Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Shaanxi [Japan, Korea].

Deparia coreana is very close to D. henryi and has often been treated as conspecific with it. However, D. coreana differs from D. henryi in the swollen base of the stipe with pneumatophores and the thick bullate indusia.