宪需鳞毛蕨 xian xu lin mao jue

Diacalpe omeiensis Ching, Bull. Fan Mem. Inst. Biol., n.s., 1: 293. 1949.

Rhizome short, erect, ca. 1.1 cm in diam., woody, apex densely covered with dark brown scales; scales lanceolate, ca. 1.8 cm, entire, acuminate. Fronds tufted; stipe 36-50 cm, base 3-4 mm in diam., stramineous, densely covered with scales same as on rhizome, sparser and smaller upward; lamina gray-green when dry, narrowly ovate, 38-45 × ca. 30 cm, quadripinnatifid, thinly papery, glabrous abaxially, covered with brown nodose hairs adaxially, apex acuminate; pinnae 12-15 pairs, basal ones subopposite, 7-9 cm apart, ascending, distant, basal pair larger, triangular-lanceolate, 23-28 × 10-11 cm, with stalk ca. 3 cm, tripinnatifid, apex acuminate; pinnules 16-19 pairs, alternate, anadromous, with short stalk 2.5-4 mm, 2-3 cm apart, close together, basiscopic pinnules usually 2 × as large as upper ones, first basiscopic pinnule lanceolate, 10-12 × 3-4.5 cm, bipinnatifid, base rounded-truncate, slightly narrowed, apex acuminate; ultimate pinnules 18-20 pairs, with short stalk ca. 1.2 mm, distant, elliptic, 1.4-1.5 × 0.6-0.8 cm, base truncate, pinnatipartite to ultimate rachis, apex obtuse, with 3-5 obtuse teeth; lobes 5 or 6 pairs, distant, elliptic, 3-4 × 1.3-1.6 mm, undulate on both sides, apex rounded-truncate, with 2-4 small teeth; rachis and rachillae stramineous, sparsely covered with brown, short nodose hairs and small scales; veins invisible, pinnate on lobes, veinlets simple or furcate, submarginal. Sori globose, ca. 1 mm in diam., enveloped by indusium, 1 in each ultimate pinnule or lobe, dorsal on basal acroscopic veinlets; indusium brown, globose, leathery, dehisced into 2 regular valves from top when mature, entire; spores elliptic.

● Forests; 2500-2600 m. Sichuan.

Dryopteris kungiana is similar to D. pseudocaenopteris but differs by pinnae nearly without glands and indusium dehisced into 2 regular valves from top when mature.