裸茎延胡索 luo jing yan hu suo

Herbs, perennial, 10-20 cm tall, tuberous, glabrous. Tuber short, 1-2 × ca. 1 cm. Stems ascending, weak, with thin underground base without scale leaves, leafy and branched. Cauline leaves 4-5 cm stalked; blade glaucous abaxially, green adaxially, 1-2 × 1-2 cm, ternately compound; leaflets obovate, entire to deeply 3-fid. Racemes corymbose, 2-4-flowered, with long peduncle, at first suberect, in fruit recurved and approaching ground; bracts ovate, ca. 4 × 3 mm, entire. Pedicel erect, 10-15 mm, slightly elongating and somewhat arcuate in fruit. Flowers pale blue, with pinkish suffusion. Sepals ca. 1 mm, ± deeply divided. Outer petals without crest, limbs broad and flat, entire to denticulate, apex emarginate; upper petal 17-20 mm; spur straight to sigmoidally curved and slightly tapering toward apex, 11-13 mm; nectary ca. 3/5 as long as spur; lower petal 9-10 mm, shortly clawed, at very base sometimes with small narrow spurlet; limb 7-9 mm wide, rounded, emarginate; inner petals ca. 6 mm. Ovules 12; stigma rounded, with 8 papillae; basal papillae close to style didymous. Capsule (immature) dorsiventrally flattened, broadly ovoid, abruptly narrowed into a short beak, ?probably not explosively dehiscent. Fl. and fr. Jun-Jul.

● Stony places in meadows, among rocks; 3800-4500 m. NW Sichuan (Dêgê), E Xizang (Nian La).