Selaginella wuyishanensis

Description. Plants epilithic, evergreen, creeping, without erect or ascending stems. Rhizophores present at intervals throughout the length of creeping stem and branches, born on ventral side in the axil of main branches, slender, glabrous, 2 - 5 cm long, 0.1 - 0.2 mm in diameter; roots usually forked at the apex. Stem 5 - 12 cm long, rarely longer than 12 cm, 3 - 4 mm in width, irregularly and slightly dichotomously branched. Leaves arranged in four ranks (two dorsal and two ventral). Axillary leaves present at branching points, oblong-ovate, base slightly cuneate, apex acuminate, 0.8 - 1.2 x 2.2 - 2.5 mm, long ciliate along the margin from base to 2 / 3 of the axillary leaves, cilia up to 0.8 mm long. Ventral leaves asymmetrical, those on main stem similar to those on branches, imbricate on stem and branch throughout, ovate, 1.5 - 2.8 x 0.8 - 1.2 mm, apex slightly acute to acuminate, acroscopic base rounded, basiscopic base slightly cuneate, margin conspicuously white-margins; acroscopic margins ciliate at the base, cilia up to 0.6 mm long, basiscopic margins nearly entire at the base, ciliate or denticulate upward. Dorsal leaves symmetrical, ovate to oval, 0.8 - 1.6 x 0.6 - 0.9 mm, base rounded, apex aristiform, often reflexed, margins conspicuously white-callous, acroscopic margins sparsely ciliate, cilia up to 0.5 mm long, basiscopic margins ciliate, cilia short, no more than 0.1 mm long. Strobili usually in pairs or rarely three on the branches, terminal, resupinate, 1 - 2 cm long, megasporangia usually present at basal sporophylls and microsporangia present at upper ones; dorsal sporophylls ovate-lanceolate, base nearly rounded, apex acuminate, 1.2 - 1.8 x 0.4 - 0.8 mm, margin conspicuously white-callous, ciliate along the margin of basal part, cilia short; ventral sporophylls membranous, ovate-lanceolate, base rounded, apex caudate, ca. 0.6 x 1.3 mm, ciliate along the margin, cilia ca. 0.3 mm long. Megaspores yellow, trilete, oblate spheroid to subglobose, equatorial diameter 240 - 260 μm; perispore reticulate ornamentation with fine muri. Microspores reddish orange, trilete, hemispheric, equatorial diameter 35 - 42 μm; verrucate ornamentation of microspore covered with dense rodlets.