Flowering from May to June.
Primula chungensis is close relative of Primula cockburniana, but differs from the latter in its corolla pale orange (vs. orange or tinged with red), leaf blade cuneate-attenuate at base (vs. subrounded to broadly cuneate), petiole usually indistinct (vs. distinct).
Primula chungensis is occurring in SW Sichuan, SE Xizang, NW Yunnan of China.
Herbs perennial. Leaves forming a rosette; petiole slightly differentiated or to 1/4 as long as leaf blade; leaf blade elliptic to oblong or obovate-oblong, 4.5-18 cm long, 3-7 cm wide, base cuneate-attenuate, margin obscurely sinuate-lobulate, irregularly denticulate, apex rounded. Scapes 15-21 cm tall, elongating to 70 cm in fruit, scarcely farinose at nodes; umbels 2-5, superimposed, 3-13-flowered; bracts triangular to lanceolate, 1.5-4 mm long, scarcely farinose. Pedicel 0.8-1.5 cm long, elongating to 3 cm in fruit. Flowers mostly homostylous, rarely heterostylous. Calyx campanulate, 3.5-4.3 mm long, copiously yellow farinose inside, efarinose or scarcely farinose outside, parted to 1/3 or slightly below; lobes triangular, apex acute. Corolla pale orange; tube 10-13 mm long; limb 1.3-1.9 cm wide; lobes obovate, slightly emarginate. Stamens ca. 9 mm above base of corolla tube. Style slightly longer than anthers. Capsule ovoid, slightly longer than calyx.
Growing in mountain glades, marshes; 2900-3400 m.
