尖裂假瘤蕨 jian lie jia liu jue

Polypodium oxylobum Wallich ex Kunze, Linnaea 24: 255. 1851; Crypsinus kwangtungensis (Ching) Tagawa; C. oxylobus (Wallich ex Kunze) Sledge; C. pingpienensis (Ching) Nakaike ["pingpiensis"]; Phymatodes kwangtungensis Ching; P. oxyloba (Wallich ex Kunze) C. Presl ex Ching; Phymatopsis kwangtungensis (Ching) Ching; P. oxylobum (Wallich ex Kunze) Ching; P. pingpienensis Ching; P. suboxyloba Ching; P. trifida (Beddome) J. Smith; Phymatopteris kwangtungensis (Ching) Pichi Sermolli; P. oxyloba (Wallich ex Kunze) Pichi Sermolli; P. pingpienensis (Ching) Pichi Sermolli; P. suboxyloba (Ching) Pichi Sermolli; Pleopeltis oxyloba (Wallich ex Kunze) Beddome; P. trifida Beddome; Pleuridium oxylobum (Wallich ex Kunze) J. Smith; Polypodium hastatum Thunberg var. oxylobum (Wallich ex Kunze) C. B. Clarke; P. kwangtungense (Ching) Ching ex C. Christensen; P. longipes Ching (1931), not Link ex Kuntze (1850), nor Fée (1872); P. trifidum D. Don (1825), not Withering (1796), nor Hoffmann (1790).

Rhizome 4-5 mm in diam., densely scaly throughout; scales brown at center, paler toward margin, lanceolate, ca. 5 mm, margin and sometimes surface ciliate, apex acuminate. Fronds monomorphic. Stipe straw-colored or light brown, usually 10-20 cm, densely scaly at base, glabrous upward; lamina trifid or pinnatifid, incised up to 5-15 mm from costa, 20-30 × 10-20 cm, base broadly cuneate, margin entire or undulate. Lateral lobes (1 or)2-5(-8) pairs, ascending, deltoid or broadly lanceolate, 10-15 × 1.5-5 cm, base sometimes slightly contracted, apex acuminate. Costa and lateral veins raised on both surfaces. Lamina papery, both surfaces glabrous. Sori orbicular, large, slightly closer to costa.

Epiphytic on rocks or on tree trunks in evergreen forests, or terrestrial; 1000-2700 m. Guangdong, Guangxi, Sichuan, Yunnan [N India, Myanmar, Nepal, Thailand, Vietnam].

The name Polypodium oxylobum was first introduced by Wallich (Numer. List, no. 294. 1829, nom. nud.).

Polypodium trifidum var. catadromum Christ (Notul. Syst. (Paris) 1(2): 33. 1909), described from W China, is of uncertain status and may belong here.