Primula poissonii Franch.

Flowering from May to July.

Primula poissonii is close relative of Primula wilsonii, but differs from the latter in its corolla limb 1.8-3 cm wide (vs. 1-1.5 cm), lobes slightly shorter than tube (vs. ca. 1/2 as long as tube), plants not aromatic (vs. aromatic).

Primula poissonii is occurring in W Sichuan, C and N Yunnan of China.

Herbs perennial, efarinose, glabrous. Leaves forming a rosette; petiole indistinct or sometimes nearly as long as leaf blade, broadly winged; leaf blade obovate-elliptic to oblanceolate, 4-12 cm long, 1.2-5 cm wide, strongly tapering to base, margin regularly denticulate, apex rounded. Scapes 20-45 cm, elongating to 60 cm in fruit; umbels 2-6, superimposed, 3-10-flowered; bracts linear-lanceolate, 5-10 mm. Pedicel 1-2 cm. Flowers heterostylous. Calyx campanulate, ca. 5 mm, parted to 1/3; lobes triangular to oblong, apex subobtuse. Corolla deep purplish crimson or rose-purple; tube 0.9-1.1 cm; limb spreading, 1.8-3 cm wide; lobes obovate to suborbicular, 8-9.5 mm long, 6-8 mm wide, apex usually 2-cleft. Pin flowers: stamens ca. 2 mm above base of corolla tube; style ca. 6.5 mm. Thrum flowers with positions reciprocal. Capsule ovoid, slightly longer than calyx.

The chromosomal number of Primula poissonii is 2n = 22 (Nakata et al., 1997; Zhu et al., 2001).

Growing in wet areas, inundated meadows; 2500-3100 m.