21. Athyrium anisopterum Christ, Bull. Herb. Boissier. 6: 962. 1898.
宿蹄盖蕨 su ti gai jue
Aspidium fauriei (Christ) Christ var. elatius Christ; Athyrium kumaonicum Punetha; ?A. woodsioides Christ; Dryopteris thysanocarpa Hayata.
Rhizomes short, stout, erect, apex densely clothed with dark brown linear-lanceolate scales. Fronds caespitose; fertile fronds 15-55 cm; stipe brown at base, upward stramineous, 20-25 cm, 1.5-2 mm in diam., base similarly scaly, upward glabrate; lamina 2-pinnate, pinnate-pinnatifid at middle, upward pinnatifid, narrowly lanceolate, 25-35 × 9-12 cm, base slightly broadened, apex acuminate; pinnae 10-12 pairs, alternate, ascending, with stalk 1-2.5 mm, basal pinnae narrowly subtriangular, 4.5-5 × ca. 2 cm, base inequilateral, auriculate on acroscopic base, cuneate on basiscopic base, pinnate, apex shortly acute or acute; pinnules ca. 6 pairs, approximate, ascending; basal acroscopic pinnules largest, broadly ovate, ca. 1.5 cm, base subrounded, shallowly pinnatilobate, apex obtuse; pinnule segments entire, other pinnules similar to each other; upper pinnules gradually smaller, connate to each other by narrow wing, subentire; veins visible abaxially, pinnate in pinnules, simple. Lamina herbaceous when dried, yellow-greenish brown, glabrate; rachis and costae abaxially with sparse brown linear-lanceolate scales. Sori large, horseshoe-shaped or J-shaped, uniseriate on each side of midrib, close to costule; indusia pale brown, large, horseshoe-shaped or J-shaped, membranous, erose at margin, persistent. Perispore hyaline, with few folds. 2n = 80, 160.
Rock crevices in forests, damp areas at streamsides; 1100-2500 m. Guangdong, Guangxi, Guizhou, Hunan, Jiangxi, Sichuan, Taiwan, Xizang, Yunnan [India, Indonesia, Malaysia, Myanmar, Nepal, Philippines, Sri Lanka, Thailand, Vietnam].
"Athyrium thysanocarpum" (Hayata, Icon. Pl. Formosan. 4: 160. 1914) belongs here but was merely cited as a synonym and was not therefore validly published (Melbourne Code, Art. 36.1(c)).