海南肋毛蕨 hai nan lei mao jue

Dryopteris decurrentipinnata Ching, Bull. Fan Mem. Inst. Biol. 2: 195. 1931 ["decurrenti-pinnata"].

Rhizomes erect or suberect; rhizome scales brown, narrowly lanceolate to linear-subulate, 1.5-2 mm. Stipe stramineous, 40-70 cm; stipe scales spreading, reddish brown, subulate, 6-8 mm; scales on rachises and costae similar but smaller. Lamina 3-pinnate or 4-pinnate-pinnatifid, triangular-lanceolate, 60-80 × 30-50 cm; pinnae 12-18 pairs; basal pinnae largest, triangular-lanceolate, 20-30 × 15-25 cm; pinnules 10-13 pairs; basal basiscopic pinnules of basal pinnae longest, 10-20 × 3-6 cm; bases of upper pinnae or lobes decurrent with veinlets arising from rachis. Lamina herbaceous to thinly papery; veins free, distinct, no veinlets arising from costae except a few in distal part of costae. Sori medial or submedial, indusiate, indusia usually persistent. Perispore coarsely folded or tuberculate.

Forests; 500-1400 m. Hainan [Philippines, Vietnam].