Fumaria impatiens Pallas, Reise Russ. Reich. 3: 286. 1776; Corydalis impatiens var. minima Michajlova; C. sibirica (Linnaeus f.) Persoon subsp. impatiens (Pallas) A. Gubanov; C. sibirica var. impatiens (Pallas) Regel.

Herbs, annual or more often ?biennial, 10-40 cm tall, glabrous, with taproot. Stems erect to suberect, often purplish, winged-ridged, branched from base and above. Petiole of basal leaves 4-6 cm, vaginate at base; blade glaucous abaxially, green or glaucous adaxially, bi- to triternate; leaflets deeply divided into 2 or 3 obovate to oblanceolate, obtuse to subacute mucronate lobes. Racemes 5-11-flowered, rather lax in fruit; lowermost bract often large and divided, middle and upper bracts usually entire, lanceolate, 5-7 mm. Pedicel 3-5 mm, recurved in fruit. Sepals minute, ca. 0.5 mm, dentate. Corolla pale yellow; outer petals obtuse, mucronate, with narrow usually dentate crests slightly overtopping apex; spur of upper petal 2-3 mm, obtuse; nectary ca. 1/2 as long as spur; lower petal without basal pouch; inner petals 4-5 mm. Stigma with narrow sinus, 4 apical stalked papillae, and a pair of geminate papillae close to apex. Fruit oblong, 9-14 × ca. 2 mm, 3-8-seeded; style short, 1(-1.5) mm. Seeds in 1 row, 1.6-1.7 mm, smooth; elaiosome small. Fl. and fr. Jun-Oct.

Forest understories, shrubs on slopes, tussocks, roadsides; ca. 1700 m. N Gansu, Jilin, Nei Mongol (Wulashan), N Qinghai, Shanxi (Dawutai Shan) [Mongolia, Russia (Siberia)].