Description:
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Plant sub-erect, main stem up to 40 cm long and 1.5–1.8 mm in diam., profusely branched above, cylindrical, often with two furrows on dorsal side when dry, glabrous, yellow brownish green above; rhizophores numerous, stout, on the lower 2/3, up to 15 cm long and 1 mm in diameter, arising at right angles to the stem or reflexed; branches 2–3-pinnate, diverging at right or acute angles to the stem, brownish towards the top, stout, primary branches up to 10–12 cm long and c. 1 mm in diameter. Leaves heteromorphic, dull green on the dorsal side, pale metallic green on the ventral side; lateral leaves closely spaced or imbricated, 2.8–3 x 1.5–1.8 mm, with a midrib not reaching the apex, unequal, acroscopic side half-ovate to lanceolate, rounded at base, long ciliated at margin towards base and subentire towards apex, basiscopic side semi-linear to oblong, truncate at base, subentire; median leaves c. 1.5 mm apart, c. 1.2 x 0.8 mm, subcircular or subcircular-elliptical, slightly unequal, with conspicuous midrib and reaching apex, rounded at the base, hyaline and ciliate on the edges, obtuse and awned, with a green ridge reaching about ⅓ of the length of the blade; axillary leaves c. 2 x 1.5 mm, ovate-lanceolate, slightly unequal, with a midrib not reaching the apex, rounded at the base, with a ciliate margin below and entire above , acute at the apex. Strobili solitary at end of last branches, 5(–10) x c. 2 mm. sporophylls dimorphic; dorsal sporophylls green, c. 1.2 x 0.7–0.8 mm, oblong-lanceolate, slightly unequal, rounded at base, loosely serrate at margins, acute at apex, keeled, with keel hyaline, well developed, shortly ciliate; ventral sporophylls hyaline, c. 0.75 x 0.5–0.6 mm, broadly ovate-triangular, shortly ciliate at margins, narrowly acute at apex; with 2 kind of spores. |