密果双盖蕨 mi guo shuang gai jue

Asplenium spectabile Wallich ex Mettenius, Abh. Senckenberg. Naturf. Ges. 3: 240 (seors. 196). 1859; Allantodia spectabilis (Wallich ex Mettenius) Ching; Athyrium spectabile (Wallich ex Mettenius) C. Presl; Diplazium jerdonii Beddome.

Plants evergreen, medium-sized. Rhizome creeping, black-brown, ca. 1 mm in diam., apex like base of stipe, slightly scaly; scales brown or black-brown, ovate or ovate-lanceolate, entire, base subpeltate, adpressed, few borne on stiff conical shortly aculeate protuberances; stipe slightly rough when scales fallen; fronds distant or approximate. Fertile fronds up to 1.2 m; stipe black-brown at base, upward stramineous or pale green-stramineous, up to 60 cm, up to 4 mm in diam. at base, upward glabrous; lamina 2-pinnate with pinnatipartite pinnules, deltoid, up to 60 × 50 cm, apex acuminate; pinnae up to ca. 12 pairs, mostly alternate, slightly ascending, apex long acuminate; lower pinnae oblong-lanceolate, with stalk up to 3 mm, 1-pinnate; basal pinnae largest, up to 30 × 15 cm; pinnules up to 10 pairs or more, alternate, subspreading; lower pinnules shortly stalked, oblong-lanceolate, lanceolate, or ovate-oblong, up to 9 × 3 cm, base broadly cuneate or shallowly cordate, usually pinnatilobate to costa, apex acuminate or rounded; pinnule lobes up to ca. 10 pairs, subspreading, oblong or subrectangular, margin prominently dentate or pinnatilobate, apex rounded or truncate; veins pinnate, not prominent, veinlets 8 pairs per lobe, ascending, often forked or simple. Lamina papery or thinly papery when dry; rachis and costa stramineous, with sparse brown ovate scales abaxially, glabrous adaxially. Sori short, sausage-shaped, up to 4 or 5 pairs per pinnule lobe, costular, single or double; indusia brown, membranous, vaulted when mature, often irregularly ruptured on back. Spores subreniform, perispore prominent, projections not rugate, granular. 2n = 82.

Evergreen broad-leaved forests, beside streamlets; 1500-2700 m. Yunnan [Bhutan, India (Sikkim), Nepal].