Drynaria delavayi Christ
- genus Drynaria ( Bory ) J.Sm.
Rhizome 1-2 cm thick, with many old persist stipes, creeping; scales soft, tuft, basifixed, 4-10 mm long, 0.5-1 mm wide, base auriculate, margin biserrate; fronds dimorphic; base fronds sessile, ovate to oblong, 6-15 cm long, 4-10 cm wide, base auriculate, pinnatilobed to 2/3 or more, lobes 5-7 pairs, margin slightly dentate; foliage fronds stalked, stipes 3-9 cm long, winged; laminae pinnatifid, 25-45 cm long, 12-18 cm wide, apex aborted or not; pinnae 7-13 pairs, spreading, lanceolate, 7.5-12 cm long, 1.5-3 cm wide, apex acute, margin shallowly dentate, glabrous or with few hairs; laminae sparsely hairy on both surfaces, especially along costa and veins. Sori in one stright row between costa and margin, close to costa, one row between lateral veins. Sporangia often with glandulars. Spores with verrucate.
Drynaria delavayi is close relative of Drynaria sinica, but differs from the latter in its foliage fronds 12-20 cm (vs. 7-12 cm) broad, pinnae 1.2-2 cm (vs. 0.5-12 cm) broad, apex of pinnae acuminate (vs. acute).
Ecology and Distribution
Drynaria delavayi is occurring S Gansu, Qinghai, Shaanxi, Sichuan, E Xizang and NW Yunnan of China, Bhutan, Myanmar.
Growing in grassy slopes, stones, epiphytic or epilithic; 1300-4200 m.
The rhizome of Drynaria delavayi are used medicinally to alleviate pain.
- Drynaria rivalis var. yunnanensis Christ (synonym)