地卷柏 di juan bai

Lycopodioides prostrata H. S. Kung, Fl. Sichuan. 6: 76. 1988.

Plants epilithic, evergreen, prostrate, 5-15 cm. Rhizophores at intervals throughout length of creeping stem and branches, borne on ventral side in axils of branches. Main stems branched throughout, stramineous, ca. 0.2 mm in diam. in lower part, terete, slightly sulcate, branches few, branchlets sparse; leafy portion of main stem including leaves 3.6-4.6 mm wide at middle, ultimate branches 3-4.4 mm wide including leaves. Axillary leaves on main stems larger than those on branches, ovate-lanceolate, base not peltate, obtuse; axillary leaves on branches ± symmetrical, ovate-lanceolate or narrowly elliptic, 1.2-1.9 × 0.4-0.8 mm, base exauriculate, margin sparsely long ciliolate in basal half, cilia ca. 0.2 mm. Dorsal leaves ± symmetrical, those on main stems in leafy portion slightly larger than those on branches; dorsal leaves on branches not approximate, contiguous, or imbricate, ovate, broadly ovate, or suborbicular, 1-1.7 × 0.6-1 mm, not carinate, base obtuse, margin sparsely long ciliolate, cilia 0.3-0.4 mm, apex acuminate or aristate, often reflexed. Ventral leaves asymmetrical, those on main stem not obviously larger than those on branches; ventral leaves on branches distant, spreading or deflexed, obliquely ovate, 1.6-2.8 × 1-1.4 mm, apex acute or acuminate; acroscopic base rounded, not overlapping stem and branches, margin sparsely ciliolate, cilia 0.2-0.3 mm. Strobili solitary or forked, terminal, compact, dorsiventrally complanate, 4.5-9 × 3-4.8 mm; sporophylls strongly dimorphic, non-resupinate, not white-margined; dorsal sporophylls ovate, not keeled, margin ciliolate, apex acuminate, without sporophyll-pteryx; ventral sporophylls broadly oblong-ovate; basal sporophylls larger than upper, not carinate, margin ciliolate, with only 1 megasporophyll at base on lower side of strobilus, elsewhere with microsporophylls, or megasporophylls in basal portion of lower side; microsporangia cordate, rather thin, with relatively large cells at central part; microspores orange-red, megaspores pale yellow or orange.

● In rock crevices, on moss-covered rocks in forests; 1500-2500 m. Guizhou, Shaanxi, Sichuan, Yunnan.