Primula caldaria W. W. Sm. & Forrest

Herbs perennial, stoloniferous. Stolons 5--20 cm, terminating in a leaf rosette, with alternate leaves on lower part. Leaves forming a rosette; petiole narrowly winged, nearly as long as leaf blade; leaf blade oblanceolate, 2--15(--25) X 0.6--1.8(--3.5) cm, abaxially white farinose, adaxially glabrous, base long-attenuate, margin remotely blunt denticulate above middle, apex rounded to obtuse. Scapes (5--)8--35(--45) cm, farinose toward apex; umbels 10--30-flowered. Pedicel 5--12 mm, elongating to 2 cm in fruit, usually white farinose. Flowers heterostylous. Calyx campanulate, ca. 4.5 mm, ± farinose, parted to middle; lobes lanceolate, apex acute. Corolla white or violet; tube 6--7 mm; limb 5--7 mm wide; lobes obovate, emarginate. Pin flowers: stamens at middle of corolla tube; style reaching mouth. Thrum flowers with positions reciprocal. Capsule globose, nearly as long as calyx. Fl. May. 2n = 16@.

E Xizang, NW Yunnan.

* Ditches, near hot springs; 2200--3000 m.

Primula caldaria W. W. Smith & Forrest var. nana W. W. Smith & Forrest.