Description:
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Plant sub-erect, often curved and rooting at the tip, with main stem up to 40 cm long and 2–2.5 mm in diam., pale green or straw-yellow, brownish in the last branches, branched; rhizophores 1.5–2 cm long, filiform, pale greenish, forming a right angle with the main stem or reflexed; branches diverging about 45º, 2-3-pinnate, ovate-triangular to lanceolate in outline. Leaves strongly dimorphic save at base of main stem; lateral leaves ± contiguous, ± 2.5 x 1.5 mm, apex pointed, base unequilateral, with median nerve visible almost to apex, acroscopic half semi-ovate to lanceolate, rounded at the base, slightly serrulate, basiscopic half semi-elliptic to oblong, obliquely truncate at base, long-ciliate near base and serrulate towards apex; median leaves imbricate, broadly ovate, ± 1.8 x 0.8 mm, obliquely-arcuate, base ordate, margin hyaline, strongly ciliate at base, serrulate towards the apex, aristate, the arista curved, longer than 1/2 the limb; axillary leaves ovate-lanceolate, ± 2 x 1 mm, apex pointed, base rounded and long ciliate. Strobili solitary at the tips of the ultimate branchlets, tetragonous, 5–6 x ± 1.5 mm. Sporophylls uniform, ovate-triangular, ± 1.5 x 0.8 mm, serrulate, long acuminate at apex; with 2 kind of spores. |