五台山延胡索 wu tai shan yan hu suo

Herbs, perennial. Tuber oblong, 5-20 × 5-10 mm, base divided or not. Stems ascending to erect, 4-18 cm, branched, at base with 1-3 scales. Cauline leaves long petiolate, vaginate at base, strongly glaucous abaxially, green or glaucous adaxially, ternate; leaflets sessile, deeply divided into 2 or 3 obovate segments, entire or again shallowly divided into overlapping lobules. Racemes densely (1 or)2-5-flowered; peduncle 3-8 cm, thickened; bracts broadly obovate, 5-10 mm. Pedicel 3-6 mm, straight at fruiting. Flowers nutant, pale purple. Outer petals narrow, acute, narrowly crested or ecristate; upper petal (15-)18-21 mm; spur straight or downcurved at tip, 10-12 mm; nectary extended through ca. 2/3 of spur, apex obtuse; lower petal navicular; inner petals 7-8 mm. Stigma with broad apex, rounded-cuneate at base, apically with 4 papillae, lateral geminate papillae small or absent. Capsule pendent from erect pedicel, obovoid, 8-12 × 3-5 mm, 4-10-seeded; style ca. 1.5 mm. Fl. and fr. May-Jul.

● Mountain slopes; 2000-3000 m. W Hebei (Xiaowutai Shan), NE Shanxi (Wutai Shan).