短柄滨禾蕨 duan bing bin he jue

Polypodium dorsipilum Christ, Monsunia 1: 59. 1900; Grammitis dorsipila (Christ) C. Christensen & Tardieu.

Stipe 0.1-0.4 cm, with dense short simple solitary dark reddish brown hairs 0.1-0.2 mm; phyllopodia absent. Lamina narrowly oblanceolate to linear-oblanceolate, 1.4-6.1 × 0.2-0.4 cm, gradually attenuate or cuneate to stipe, margin entire, apex bluntly acute to obtuse; midrib brown or dark brown, slightly prominent abaxially, sometimes slightly prominent adaxially; lateral veins hidden, 1-forked, acroscopic branch shorter than basiscopic branch, extending beyond sorus or not, endings with sometimes indistinct hydathodes; hairs sparse to frequent on all parts of lamina, simple, solitary, dark reddish brown, 0.1-0.5 mm. Sori orbicular or elliptic, superficial, close to midrib. Sporangia setose.

Usually epiphytic on tree trunks or rupestral beside streams in mountain forests; 600-1200 m. ?Fujian, Guangdong, ?Guangxi, ?Jiangxi, ?Zhejiang [Cambodia, Japan, Laos, Thailand, Vietnam].

Grammitis fenicis of Fl. Taiwan (ed. 2, 1: 527. 1994) is not G. fenicis Copeland (Univ. Calif. Publ. Bot. 18: 224. 1942; Oreogrammitis fenicis (Copeland) Parris), nor is it G. dorsipila as in FRPS (6(2): 318. 2000). In the Fl. Taiwan description, the solitary, rather than tufted, marginal hairs rule out G. fenicis, and the non-setose sporangia rule out both G. fenicis and G. dorsipila. Further studies are needed.