有柄马尾杉 you bing ma wei shan

Lycopodium hamiltonii Sprengel ex Greville & Hooker var. petiolatum C. B. Clarke, Trans. Linn. Soc. London, Bot. 1: 593. 1880; Huperzia petiolata (C. B. Clarke) R. D. Dixit; L. petiolatum (C. B. Clarke) Baker; Phlegmariurus hamiltonii (Sprengel ex Greville & Hooker) Li Bing Zhang var. petiolatus (C. B. Clarke) Ching; Urostachys hamiltonii (Sprengel ex Greville & Hooker) Herter ex Nessel var. petiolatus (C. B. Clarke) Herter ex Nessel; U. petiolatus (C. B. Clarke) Herter ex Nessel.

Lycophytes, medium-sized. Stems caespitose, mature branches pendulous, 2 to several times forked, 20-75 cm, main stems ca. 5 mm in diam., stem together with leaves 2.8-3.5 cm wide. Trophophylls attached at right angles with stem or pointing upward, lustrous, elliptic-lanceolate, ca. 1.2 cm, less than 2 mm wide at middle, leathery, midrib distinct, base cuneate, decurrent, conspicuously stipitate, margin entire, apex acuminate. Strobili slightly thinner than sterile part, not columniform, terminal on branches. Sporophylls sparsely arranged, elliptic-lanceolate, 6-9 × ca. 1 mm, midrib distinct, base cuneate, margin entire, apex acute. Sporangia yellowish, reniform, vertically bisected.

Epiphytic on tree trunks or rocks by rivers and roadsides in forests or terrestrial; 600-2500 m. Chongqing, Fujian, Guangdong, Guangxi, Guizhou (Chishui), Hainan, Hunan, Sichuan, Yunnan (Yimen, Yingjiang) [India].

Phlegmariurus petiolatus differs from the American P. taxifolius (Swartz) Á. Löve & D. Löve. The two should not be treated as conspecific.

The leaves of this species are elliptic-lanceolate and conspicuously stipitate.