浅裂双盖蕨 qian lie shuang gai jue

Lithophytes, evergreen, small to medium-sized. Rhizome erect, brown, ca. 5 mm in diam., up to 2 cm in diam. including remaining stipes, apex densely scaly; scales brown, lanceolate, ca. 6 mm, thickly membranous, entire; fronds caespitose. Stipe brown at base, upward stramineous, light brown-stramineous or green-stramineous, 15-20 cm, ca. 3 mm in diam., base with sparse lanceolate or ovate-lanceolate brown scales, upward glabrous, grooved adaxially; lamina 1-pinnate, broadly oblong-lanceolate, 25-35 × 7-11 cm, apex acuminate; pinnae 16-22 pairs, slightly ascending, lower pinnae subopposite, upper pinnae alternate, all sickle-shaped lanceolate, falcate, base asymmetrical, basiscopic base cuneate, acroscopic base truncate with deltoid or oblong auricles, shallowly pinnatilobate or serrate, with stalk ca. 2 mm and winged, apex acuminate or long acuminate; middle pinnae 5-8 × 1-2 cm, basal pinnae slightly smaller; pinna lobes broadly deltoid or semicircular, apex serrate or obtusely serrate; veins not prominent adaxially, slightly raised abaxially, veinlets trifurcate, pinnate in auricle, ascending. Lamina herbaceous, gray-green when dry, glabrous on both surfaces; rachis stramineous, pale brown-stramineous or green-stramineous, glabrous, shallowly grooved adaxially. Sori shortly linear, slightly curved, 3-7 mm, 8-14 pairs per each pinna, in single row along costa, 2-4 pairs in auricle, mostly single, rarely double; indusia brown, linear, membranous, persistent; perispore loose and hyaline, few rugate, sparsely spiny. 2n = 82.

Evergreen broad-leaved forests, wet calcareous areas; 1500-2500 m. S Xizang, Yunnan [N India, N Myanmar, Nepal].

Lower Taxa

• Diplazium lobulosum var. lobulosum
• Diplazium lobulosum var. shilinicola (W. M. Chu & J. J. He) Z. R. He