Cyclicity
provided by Plants of Tibet
Flowering from May to July.
Diagnostic Description
provided by Plants of Tibet
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).
Distribution
provided by Plants of Tibet
Primula poissonii is occurring in W Sichuan, C and N Yunnan of China.
General Description
provided by Plants of Tibet
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.
Genetics
provided by Plants of Tibet
The chromosomal number of Primula poissonii is 2n = 22 (Nakata et al., 1997; Zhu et al., 2001).
Habitat
provided by Plants of Tibet
Growing in wet areas, inundated meadows; 2500-3100 m.