宝兴冷蕨 bao xing leng jue

Cystopteris mairei Brause; C. sphaerocarpa Hayata; C. sudetica A. Braun & Milde var. moupinensis (Franchet) C. Christensen; C. tangutica Grubov.

Rhizomes long creeping, 1-2 mm in diam., rhizomes and stipe bases clothed with brown hairs and few pale brown, broadly ovate, membranous scales. Fronds distant; fertile fronds (20-)30-40(-50) cm; stipe stramineous or chestnut-brown, shiny, 10-22(-25) cm, 1-2 mm in diam.; lamina pinnate-pinnatifid to 3-pinnate, ovate or deltoid-ovate, 9-17(-25) × 5-8(-15) cm, thinly herbaceous when dried, apex acuminate; pinnae 8-12(-15) pairs, ascending, basal pinnae oblong or ovate-lanceolate, 5-10 × 2-3.5 cm, as long as and wider than second basal pinnae, toothed, base slightly narrowed and inequilateral, with stalk 3-4 mm (2-3 mm in second basal pinnae), apex acuminate, subopposite, 3-3.5(-5) cm apart from second basal pinnae; pinnules 8-12 pairs, anadromous, alternate, usually acroscopic pinnule slightly shorter than basiscopic one, second basal basiscopic pinnule largest, deltoid-ovate or narrowly triangular, 1-2.2(-3) cm × 8-13 mm, toothed, inequilateral, acroscopic base parallel to costae, basiscopic base broadly cuneate, with stalk 1-2 mm, apex obtuse; secondary pinnules or pinnule segments 3 or 4 pairs; basal acroscopic one largest, broadly ovate, 4-9 × 3-5 mm, base cuneate and adnate to costular wing, cut or toothed at margin, apex rounded-obtuse and toothed; upper secondary pinnules rhomboid or shortly linear, apex and acroscopic side toothed. Veins visible on surfaces, 1 to several times forked, terminating in emarginations. Sori small, orbicular, abaxial on suprabasal veins, 1 or 2 sori per ultimate segment; indusia pale green or yellow-brown, orbicular or shallowly cupular, membranous, without tiny glandular hairs, covering sporangia when young, hidden at maturity. Perispore echinate.

Damp areas and on wet rocks in mixed forests; 1000-4100 m. Gansu, NW Guizhou, Hebei, Henan, Qinghai, Shaanxi, Sichuan, Taiwan, SE Xizang, Yunnan [N India].

Cystopteris moupinensis is very similar to C. sudetica but differs in the indusia without tiny glandular hairs and the plants moderately stout. The two are segregated phytogeographically: C. sudetica occurs in N and NE China, and occasionally in high mountains of Yunnan and Xizang, while C. moupinensis occurs in mountains of W China, north to Qin Ling and west to E Xizang.