马尾杉 ma wei shan

Lycopodium phlegmaria Linnaeus, Sp. Pl. 2: 1101. 1753; Huperzia phlegmaria (Linnaeus) Rothmaler; Lepidotis phlegmaria (Linnaeus) P. Beauvois; Lycopodium filiforme Wallich ex Roxburgh (1844), not Swartz (1801); Urostachys phlegmaria (Linnaeus) Herter ex Nessel.

Lycophytes, medium-sized. Stems caespitose, slender and pendulous, 4-6 times dichotomously branched, 20-40 cm, main stems ca. 3 mm in diam., stem together with leaves flat or nearly flat, not cordlike. Leaves conspicuously dimorphic. Trophophylls obliquely spreading, not lustrous, ovate-triangular, 5-10 × 3-5 mm, leathery, abaxially flat, midrib distinct, base cordate or subcordate, decurrent, conspicuously and shortly stipitate, margin entire, apex acuminate. Strobili terminal on branches, linear, 9-14 cm. Sporophylls sparsely arranged, ovate, ca. 1.2 × 1 mm, midrib distinct, margin entire, apex acute. Sporangia yellowish, reniform, vertically bisected.

Epiphytic on tree trunks or rocks in forests; 100-2400 m. Guangdong, Guangxi, Hainan, Taiwan, Yunnan [Cambodia, India, Japan, Laos, Nepal, Thailand, Vietnam; Pacific islands, Paleotropics, South America].

The strobili of Phlegmariurus phlegmaria are pendulous, cordlike, or like horsetail plants. Moreover, the base of its trophophylls is cordate or subcordate and shortly stipitate.