光轴肿足蕨 guang zhou zhong zu jue

Nephrodium hirsutum D. Don, Prodr. Fl. Nepal. 6. 1825; Aspidium eriocarpum Wallich ex Mettenius; Hypodematium eriocarpum (Wallich ex Mettenius) Ching; H. microlepioides Ching ex K. H. Shing; Lastrea eriocarpa (Wallich ex Mettenius) C. Presl; N. eriocarpum (Wallich ex Mettenius) Decaisne.

Plants (23-)35-60(-80) cm tall. Rhizomes prostrate, densely scaly together with swollen stipe base; scales reddish brown, linear-lanceolate, 1-1.5 cm × 1-1.3 mm. Fronds approximate; stipe light brownish stramineous, lustrous, (7-)15-25(-40) cm × 1.5-3.5 mm, upward glabrous; lamina broadly ovate to pentagonal-ovate, (12-)17-45 cm, thinly herbaceous, both surfaces with sparse short, grayish white hairs, 4-pinnate at base, 3-pinnate or 3-pinnatifid upward, apex acuminate; costae and costules sometimes abaxially covered with reddish brown, linear-lanceolate scales; pinnae 8-12 pairs, slightly oblique, basal pair largest, deltoid-oblong, 9-25(-30) × 8-12(-20) cm, (0.5-)1-2 cm stalked, 3-pinnate, apex shortly acuminate; pinnules (7 or)8-20 pairs, anadromous, oblique, acroscopic ones smaller, proximal basiscopic pair largest, triangular-lanceolate, (3-)6-12 × (2-)4-6 cm, shortly stalked, base cuneate, 2-pinnate, apex acuminate; ultimate pinnules (4 or)5-8 pairs, oblong, base cuneate and decurrent, connected to each other by narrow wings, 3-5-lobed, each lobe with 2-4 serratures at apex, apex obtuse. Veins obvious on both surfaces, pinnate, ending at margin. Sori orbicular, 1-3 per ultimate pinnule, at middle of veinlets; indusia grayish brown, reniform, large, densely covered with hairs. Spores ellipsoid, bearing inflated folds, with echinate ornaments.

Mountain slopes, limestone crevices within forests; 400-2000 m. SE Gansu (Kangxian, Wenxian), Guizhou (Hezhang), W Henan, Shaanxi (Ningshan), Sichuan, Xizang, Yunnan [Bhutan, India, Myanmar, Nepal].