粉背瘤足蕨 fen bei liu zu jue

Lomaria glauca Blume, Enum. Pl. Javae 2: 204. 1828; Blechnum papuanum Brause; Plagiogyria brausei Nakaike; P. distanta R. D. Dixit & A. Das; P. formosana Nakai; P. formosana var. angustata Nakaike; P. glauca subsp. formosana (Nakai) Nakaike; P. glauca var. nana (Copeland) C. Christensen; P. glauca var. philippinensis Christ; P. glaucescens Ching; P. glaucescens var. arguta Ching; P. media Ching; P. nana Copeland; P. papuana (Brause) Alston (1939), not C. Christensen (1937); Struthiopteris papuana (Brause) Ching.

Stipes 3-55(-60) cm on sterile fronds, 5-75 cm on fertile fronds, distally tetragonal, orbicular, or ovate in cross section; vascular bundle U-shaped; stipes and rachises glabrous to hairy, sometimes densely hairy; aerophores elongate and hornlike with blunt apex. Sterile lamina pinnate, 7-110 × 2-30 cm, glaucous abaxially, apically with a pinnatilobed segment or a pinnalike segment; rachises abaxially semiterete to flattened, or grooved; pinnae 13-43 pairs; proximal pinnae sessile to shortly stalked, base truncate or rounded, not deflexed to subdeflexed, abruptly abbreviated or not, sometimes becoming vestigial on stipe; middle pinnae sessile, base truncate or rounded; veins as many simple as forked. Fertile lamina pinnate, 11-77 × 4-24 cm; rachises abaxially semiterete, flattened, or grooved; pinnae 13-43 pairs, shortly stalked or sessile; proximal pinnae gradually abbreviated or some pairs becoming aerophore-like vestiges. Paraphyses few, shed early, dark brown or yellow. Spores yellow to brown, not obviously tuberculate.

Grasslands, slightly shaded or open places; 1200-3800 m. Sichuan, Taiwan, Xizang, Yunnan [E India, Indonesia, Malaysia (Borneo), N Myanmar, New Guinea, Philippines (Luzon, Mindanao); SW Pacific islands (S New Ireland, Solomon Islands)].