Description:
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Rhizome erect, 2-3 mm in diameter, loosely scaly; rhizome scales appressed, wide-triangular in outline, apex long tapering, base curved, margin uneven, 3-6 x 1.5-2 mm, heterotoechae (?), central area brown, cells with walls thickened with large lumen, marginal areas thin-membraneous, cells with smaller walls. Fronds monomorphic, loose, erect, 32–40 cm long, gemmiferous near the apex. Stipe rounded only on one side, deeply channeled above, 10-12 cm long, c. 1.5 mm diameter, smooth, base dense, loosely scaly above, basal scales similar to rhizome scales but smaller, scales towards apex gradually smaller, narrowly triangular. Lamina bipinnate, ovate-lanceolate in outline, 22-28 x 8-11 cm, olive on both sides; pinnae pluri-jugate, remote, triangular or oblong in outline, uneven, basiscopic side cut-to-arched, acroscopic straight, 4-5.5 x 1.2-1.8 cm, pinatifid; lobes remote, up to the top of the pinnae well spaced, the direction very variable, basiscopic lobes attached at a narrow angle, oblique, mostly converging, 1-4 lower forked, remaining undivided, narrowly oblanceolate-linear, base arched or curved, apex rounded, 4-9 x 1.2 mm, single vein spaced, one sora, acroscopic at an almost straight angle attached, generally straight, the base more broadly, pinnate or bifurcate, provided with 3-6 lobes, obtriangular or obovate, 2-4 sori, 1-3 proximal furcate, remaining undivided, narrowly oblanceolate-linear, rounded at apex, 6-11 x 1.2 mm, each vein spaced, one sora; rhachis almost cylindrical at base, nearly flat above, above deeply channeled; costa narrowly winged, equilateral from base to tip, below flat, very prominent above, sparsely scaled. Sori straight or arched, linear, 4 x 0.5 mm; indusium membranous minutely undulate-erose.
Translated from Latin, needs to be checked with specimens! |