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Lycophyte
Lycophyte
Selaginella siamensis
Nomenclature
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Family: SelaginellaceaeGenus: Selaginella
SUMMARY
Stems long, growing indefinitely, climbing up bushes or procumbent, irregularly rooting, 0.7-1.5 mm in diameter, bearing sparsely monomorphic leaves, glabrous, rhizophores long, 0.3-0.5 mm. in diameter; lateral branch tripinnate, ovate to oblong-subtriangular in outline, ultimate branch 3 mm wide. Stem leaves brown, ovate, apex long aristate, 2.7-3.2 mm long, 1.6-1.9 mm. wide; ventral leaves ascending, ovate-oblong, acute to mucronate with long aristate at apex, cordate at base, 1.5-1.8 mm. long, 1.0-1.2 mm. wide; edges ciliate with white setae about 0.1 mm. at base up to middle of leaves, papyraceous, green or sometimes reddish; dorsal leaves, nearly the same as or smaller than the ventral leaves in size, asymmetrically oblong to suborbicular with long pale tails at apex, 1.3-1.7 mm. long, 0.9-1.0 mm. wide, ciliate at margin. Strobili 2-5 mm. long, 1.6-2.9 mm. in diameter with sporophyll; sporophyll uniform, ovate-subtriangular with long tail, 1.3-1.6 mm. long, 0.6-0.9 mm. wide; sporangia vertically bisected 0.5-0.6 mm. long and wide.
Thailand NORTHERN: Chiang Rai (Doi Pacho), Chiang Mai (Khun Khong), Lampang, Phitsanulok (Thung Saleang Luang, Phu Miang), Tak (Ban Musoe); NORTH-EASTERN: Loei (Phu Luang, Phu Kradung); CENTRAL: Nakhon Nayok (Khao Yai); EASTERN: Nakhon Ratchasima (Khao Yai); SOUTH-EASTERN: Trat (Koh Chang-type); SOUTH-WESTERN: Kanchanaburi (Thung Kang Yang HIlls); PENINSULAR: Satun (Rawai).
Distribution. — Indochina and Malaya.
Ecology. — Terrestrial, usually found on dry ground with rocks in light shade between rock plain and forest at 1500 m alt.
Specimens examined. — K.PUNCHAY 214 (BCU); M. TAGAWA, K. IWATSUKI, AND N. FUKUOKA T636, CH. CHAROENPHOL, K. LARSEN AND E. WARNCKE, 4234, 4289 (BKF).