陕西耳蕨 shan xi er jue

Dryopteris lichiangensis (C. H. Wright) C. Christensen; Nephrodium lichiangense C. H. Wright; Polystichum lichiangense (C. H. Wright) Ching ex H. S. Kung; P. obtusipinnum Ching & H. S. Kung; P. prescottianum (Wallich ex Mettenius) T. Moore var. shensiense (Christ) C. Christensen.

Plants summer-green. Rhizome erect, densely covered with lanceolate brown or light brown scales. Fronds 12-24 cm; stipe stramineous, 3-10 cm, ca. 1 mm in diam. at base, lower part persistent, with few ovate and lanceolate light brown scales. Lamina bipinnatipartite, linear-oblanceolate or oblanceolate, 11-30 × 1.2-2.4 cm, slightly contracted at base, acuminate; rachis without proliferous bulbils, both surfaces with few scales; scales light brown, lanceolate and linear. Pinnae 24-32 pairs, alternate, ascendant, slightly more distant from one another toward lamina base, sessile, narrowly ovate or narrowly deltoid-ovate, middle pairs 6-15 × 4-6 mm, bases broadly cuneate or rounded-cuneate, auriculate acroscopically and basiscopically, pinnatifid to or near to pinna rachis, apices acute or obtuse. Lobes 4-6 pairs, alternate, slightly ascendant, obovate to ovate, apices acuminate and often with several acute teeth; both surfaces glabrous or with few lanceolate light brown microscales; frond texture papery; venation pinnate on lobes, indistinct on both surfaces. Sori on upper pinnae from middle of lamina upward, in 1 row on each side of costa or 1 or 2 on each side of midrib of lobe; indusia present, subentire.

Alpine meadows, alpine coniferous forests; 2600-4000 m. Chongqing (Wushan), S Gansu, Shaanxi, W Sichuan, S Xizang, NW and W Yunnan [Bhutan, N and NW India, Kashmir, Nepal, Pakistan].