陕西假瘤蕨 shan xi jia liu jue

Basionym: Polypodium senanense Maximowicz, Bull. Acad. Imp. Sci. Saint-Pétersbourg, Sér. 3, 31: 121. 1887; Crypsinus shensiensis (Christ) X. Cheng; Phymatopsis shensiensis (Christ) Ching; P. veitchii (Baker) H. Itô var. filipes (Christ) H. Itô; Phymatopteris shensiensis (Christ) Pichi Sermolli; Polypodium shensiense Christ; P. shensiense var. filipes Christ.

Rhizome 1.5-2 mm in diam., densely scaly throughout; scales brown or dark brown at peltate base, ovate-lanceolate, margin sparsely ciliate, apex acuminate. Fronds monomorphic. Stipe straw-colored or dark stramineous, 2-5 cm, slender, glabrous; lamina pinnatisect, 5-10 × 5-7 cm, base truncate or shallowly cordate, margin shallowly serrate. Lateral lobes 2-5 pairs, lowest pair slightly deflexed at base, 2-3 × ca. 1 cm, base usually contracted, apex obtuse or acute. Costa and lateral veins distinct on both surfaces, veinlets hardly visible. Lamina herbaceous, both surfaces glabrous, grayish green. Sori orbicular, slightly nearer to costa.

Epiphytic on tree trunks or on rocks, rarely terrestrial; 1300-3600 m. Henan, Shaanxi, Shanxi, Sichuan, Xizang, Yunnan [Japan].

Crypsinus veitchii (Baker) Copeland from Japan and Korea is closely related to Selliguea senanensis, but the lamina lacks the deflexed basal lobes (Iwatsuki, Fl. Japan, as Crypsinus veitchii, http://foj.c. u-tokyo.ac.jp/gbif/foj/; accessed 4 Feb 2012).