岳麓山对囊蕨 yue lu shan dui nang jue

Basionym: Athyriopsis abbreviata W. M. Chu, Acta Phytotax. Sin. 21: 221. 1983.

Rhizome slender, creeping, ca. 2 mm in diam., with sparse pale brown, broadly lanceolate, entire, membranous scales. Fronds distant to approximate, subdimorphic; sterile fronds similar to fertile fronds, with stipe usually prominently short, lamina somewhat small; fertile fronds up to 60 cm; stipe brown-green when dry, 15-25 cm, ca. 1.5 mm in diam. at base, sparsely scaly; scales similar to those on rhizome, those on upper part sparser, gradually smaller, lanceolate or narrowly lanceolate; lamina broadly oblong-lanceolate, 20-35 × 5-13 cm, base slightly reduced, 3.5-7 cm wide, apex acuminate; free pinnae 8-12 pairs, sessile or subsessile, pinnatifid to pinnatipartite; lower pinnae spreading or reflexed, obliquely ovate or short ovate-lanceolate, 2-3.5 × 1.5-2.5 cm, apex obtuse or acute; middle pinnae slightly ascending or spreading, lanceolate, up to 7.5 × 2 cm, apex usually acuminate, rarely acute; pinna lobes up to 10 pairs in largest middle pinnae, approximate, oblong or rectangular, slightly oblique, margin shallowly repand or shallowly crenate, apex rounded or truncate; veins per lobe pinnate, with up to 5 pairs of veinlets, veinlets simple or forked, oblique. Lamina thinly herbaceous, dark green when dry, pale green underneath; rachis with sparse, deciduous, dark brown, narrowly lanceolate scales and curly short nodose hairs, costae and veinlets with slightly shorter nodose hairs. Sori shortly linear, straight or slightly curved, up to 3 pairs per lobe, single or double on basal acroscopic veinlets, medial; indusia pale brown, membranous, glabrous, margin lacerate, denticulate, or subentire, incurved when young; spores elliptic or suborbicular in polar view, semicircular in equatorial view, perispore surfaces with dense long aculeate and thinly clavate projections.

● Evergreen broad-leaved forests beside streamlets; 100-1200 m. Guangxi (Baise), Hunan (Changshan).

Deparia abbreviata is similar to D. japonica but differs by the lamina narrowly elliptic, gradually reduced to base with basal pinnae often obliquely ovate, and perispore surface with long aculeate and thinly clavate projections.