平羽碎米蕨 ping yu sui mi jue

Cheilosoria patula (Baker) P. S. Wang; Pellaea patula (Baker) Ching (1965), not (Fée) Prantl (1882).

Rhizomes erect, short; scales concolorous, black to blackish brown, subulate-lanceolate. Fronds tufted. Stipe dark brown, 8-15 cm × ca. 2 mm, adaxially flattened to shallowly grooved, groove with a pair of narrow winglike ridges along margins, these glabrous, scaly toward base; scales dark brown, subulate. Lamina brownish green when dry, elongate deltoid, 12-20 × 6-11 cm, 2- or 3-pinnate, papery, glabrous on both surfaces, broadest at base, apex acuminate; rachis somewhat flexuous; rachis and costae dark brown, adaxially grooved, groove with a pair of narrow winglike ridges along margins. Pinnae 8-10 pairs, with stalks 2-4 mm; basal pair of pinnae largest, oblong-deltoid, 3-6 × 1.6-2 cm; pinnules deltoid, 8-12 × 4-6 mm, shortly stalked, inequilateral, basiscopic pinnules longer than adjacent acroscopic ones; basal basiscopic pinnule longest. Ultimate segments oblong, margins entire, apex obtuse. Sori usually not interrupted on segments. False indusia continuous or rarely somewhat discontinuous, margins entire.

● Rock crevices; 400-900 m. Chongqing, Guangxi, Guizhou, W Hubei.