疏羽碎米蕨 shu yu sui mi jue

Pteris belangeri Bory in Bélanger, Voy. Indes Or. 2: 44. 1883; Allosorus cambodiensis (Baker) Kuntze; Cheilanthes varians Wallich ex Hooker; Cheilosoria belangeri (Bory) Ching & K. H. Shing; Pellaea cambodiensis Baker; Pteridella belangeri (Bory) Mettenius ex Kuhn.

Rhizomes erect, short; scales concolorous, dark brown, subulate-lanceolate. Fronds tufted. Stipe dark brown to nearly black, 8-23 cm, adaxially shallowly grooved, groove rounded or blunt along margins, scaly toward base; scales concolorous, dark brown, subulate lanceolate to subulate. Lamina brown when dry, narrowly triangular-lanceolate, 9-26 × 3-5 cm, pinnate-pinnatifid to 2-pinnate, papery, glabrous on both surfaces, base not or only slightly narrowed, apex long acuminate; rachis and costae dark brown, adaxially grooved, usually with minute, stalked glands, especially adaxially, sometimes glabrous abaxially. Pinnae 12-18 pairs, widely separated; basal pinnae slightly shorter to ± as long as second pair, elongate deltoid, 1.5-3.5 × 0.6-1.5 cm, stalked (stalks 1-4 mm), base broadly cuneate, apex acuminate and often somewhat caudate. Pinnules (segments) of proximal pinnae 4-6 pairs, adnate to costa, inequilateral, basiscopic pinnules somewhat longer than adjacent acroscopic ones; basal basiscopic pinnule longest, oblong-lanceolate, somewhat lobed. Sori interrupted at segment sinuses. False indusia discontinuous, margins entire or slightly undulate. 2n = 120.

On rocks, occasionally in wet soil; 100-800 m. Hainan [Bangladesh, Cambodia, India, Indonesia, Myanmar, Nepal, Philippines, Thailand, Vietnam].