亚光姬蕨 ya guang ji jue

Stipe dark brown abaxially and pale castaneous adaxially, 30-40 cm, ca. 3 mm in diam. at base, with sparse gray hairs, coarse; rachis pale castaneous, coarse, indumentum same as stipe; lamina iridescent when dry, 3-pinnate, ovate-triangular in outline, 60-75 × 25-30 cm, papery, both surfaces with slender bristles along veins; pinnae 16-18 pairs, subopposite, 1.5-2.5 cm apart, with 1.5-2 cm stalk; basal 1 or 2 pairs larger, oblong-lanceolate, 18-20 × 8-10 cm, with stalk 2-3 mm, apex acuminate; pinnules broadly lanceolate, 3-4 × 0.8-1.2 cm, apex obtuse; ultimate pinnules separate from each other, oblong, 10-15 × ca. 5 mm, sessile, ± adnate to rachis, pinnatilobate to 1/3 to midvein, apex and margin of lobes sharply toothed; costa slightly prominent, secondary veins pinnate to serrate. Sori 3-6 pairs on both sides of midvein, circular, at bases of marginal sinus, protected by reflexed, green, glabrous teeth.

● Dense forests; ca. 1000 m. W Yunnan.