小叶鳞毛蕨 xiao ye lin mao jue

Diacalpe adscendens Ching ex S. H. Wu, Acta Phytotax. Sin. 21: 378. 1983.

Rhizome short, erect, woody. Fronds tufted; stipe 12-15 cm, base 1.5-2 mm in diam., stramineous, densely covered with brown scales; scales lanceolate, 4-5 mm, membranous, entire, acuminate; lamina narrowly ovate, 19-21 × 5-9 cm, quadripinnatifid, papery, brown-green when dry, sometimes with citrus or orange glands along veins abaxially, covered with brown nodose hairs adaxially, base cuneate, apex acuminate; pinnae 14-16 pairs, opposite or terminal alternate, close together, with short stalk 3-5 mm, basal pair larger, ca. 4 cm apart from second pair, broadly lanceolate, 9-10 × 2.5-3 cm, tripinnatifid, base cuneate, apex long acuminate; pinnules 16-19 pairs, always alternate, anadromous, with short stalk 1-2 mm, 1-1.5 cm apart, distant, basiscopic pinnules usually 2 × as large as upper ones, 1 or 2 basiscopic pinnules lanceolate, 2.6-3 × ca. 0.8 cm, bipinnatifid, base symmetrical, apex acuminate; ultimate pinnules 10-12 pairs, subsessile, distant, elliptic, 4-5 × 2-3 mm, base asymmetrical, broadly cuneate, pinnatipartite to ultimate rachis, apex obtuse, with 3-5 small teeth; lobes 3 or 4 pairs, distant, elliptic, 1.5-2 × 1-1.5 mm, apex rounded-obtuse, with 2 small teeth or entire; rachis and rachillae stramineous, sparsely covered with brown curly nodose hairs and small scales; veins pinnate on lobes, veinlets simple or furcate, submarginal. Sori globose, ca. 0.5 mm in diam., enveloped by indusium, 1 in each ultimate pinnule or lobe, dorsal on basal acroscopic veinlets; indusium brown, globose, leathery.

● Forests; ca. 2900 m. Yunnan (Wuliang Shan).

Dryopteris adscendens is similar to D. pseudocaenopteris but differs by fronds 30-35 cm; lamina elliptic, ca. 20 × 6-9 cm, basal pinnae ca. 10 cm, and indusium always undivided.