87. Corydalis tangutica Peschkova, Bot. Zhurn. 75: 87. 1990.
唐古特延胡索 tang gu te yan hu suo
Herbs, perennial. Tuber oblong, 1-1.5 × 0.5-1 cm. Stems nearly erect, 4-10 cm, lower part with 2 or 3 scales, middle and upper part with 3-5 leaves, usually with late branches. Leaves long petiolate, vaginate at base; blade pale abaxially, green adaxially, ternate; lateral leaflets sessile, terminal one shortly petiolulate, all deeply 3-divided, ultimate lobes subobtuse to acute. Racemes not overtopping leaves, densely 2-5-flowered; rachis 0.5-3 cm; bracts ovate to obovate, ca. 6 × 4 mm. Pedicel 3-5 mm. Flowers pale blue to pale purple (in S Xizang clear blue). Sepals 0.5(-1) mm. Outer petals acute, without crest or rarely with narrow crest; upper petal 1.4-1.8 cm, spur straight or tip slightly downcurved, 8-10 mm; nectary extended at least through 3/4 of spur; ultimately rounded-obtuse; lower petal 7-10 mm; inner petals 6-7 mm. Stigma rounded-cuneate at base, apex broad and with 4 papillae, lateral geminate papillae small or absent. Capsule nutant, obovoid, 8-10 × 3-4 mm, 6-14-seeded; style ca. 1.5 mm. Seeds ca. 1.3 mm, with small elaiosome, slightly flattened, surface faintly colliculate. Fl. and fr. Jun-Aug.
Alpine sandy scree, among alpine shrubs, alpine meadows; 2600-5800 m. Gansu, Qinghai, N Sichuan, SE Xizang, NW Yunnan [Bhutan, ?Kashmir].
This species is distinguished from Corydalis tianzhuensis by flower color.
