Primula chamaethauma W. W. Sm.

Herbs perennial, base encircled by bud scales at anthesis. Petiole indistinct or occasionally nearly as long as leaf blade, broadly winged; leaf blade elliptic to oblong or obovate-spatulate, 2--10 X 1--3 cm, ± glandular, base attenuate, margin crenate to erose-dentate, apex rounded to obtuse. Scapes obsolete or occasionally to 6 cm and scarcely farinose toward apex; umbels 5--15-flowered; bracts linear-lanceolate, 7--10 mm. Pedicel to 6 cm in ascapose plants, 1--2 cm in scapose plants. Flowers heterostylous or occasionally homostylous. Calyx campanulate, 8--10 mm, minutely glandular, parted to middle; lobes ovate, apex obtuse to acute. Corolla wine-red, annulate; tube 1.3--1.4 cm; limb 2--3 cm wide; lobes broadly obovate, deeply emarginate. Pin flowers: stamens at middle of corolla tube; style slightly shorter than tube. Thrum flowers: stamens in upper 2/3 of corolla tube; style 6--7 mm. Homostylous flowers with stamens and style ca. as long as calyx. Capsule disintegrating at maturity. Fl. Jul-Aug.

SE Xizang, NW Yunnan [N Myanmar].

Stony mountain slopes, open banks; 4000--5000 m.

Primula chamaethauma W. W. Smith var. chiukiangensis Chen.