峨眉角蕨 e mei jiao jue

Diplazium japonicum (Thunberg) Beddome var. nudisorum C. Christensen.

Rhizome ascending; fronds caespitose. Fertile frond 60-70 cm; stipe yellow-brown at base, upward green-stramineous, 20-40 cm, ca. 3 mm in diam., base stout, with sparse brown, ovate or ovate-lanceolate, entire scales; lamina 1-pinnate below apex, ovate-oblong, as long as stipe, 15-25 cm wide, apex acuminate and pinnatilobate; pinnae up to 13 pairs, shortly stalked, subspreading or narrowly elliptic-lanceolate, straight or sickle-shaped, oblique, dentate, pinnatifid to pinnatilobate, or basal pinnae sometimes deeply pinnatifid, apex long acuminate; basal pinnae short, spreading or reflexed, narrowly elliptic-lanceolate, 7-12 × 2-4 cm; middle pinnae up to 16 cm; pinna lobes up to 15 pairs, subcontiguous, slightly ascending, margin shallowly serrate or crenate, apex rounded; veins visible on adaxial side, prominent on abaxial side, pinnate, veinlets up to 7 pairs, oblique, simple or forked, basal veinlets curved, ending below lobe margin. Lamina herbaceous when dry, gray-brown abaxially, brown-green adaxially, glabrous on both surfaces. Sori brown-red, shortly linear or elliptic, up to 6 pairs, medial; spores semicircular in equatorial view, perispore with prominent, rarely rugate projections.

● Forests on hillsides; 1100-2400 m. Guizhou, Sichuan.