Caudex obconical. Stem 26--100 cm, simple or branched, glabrous, apically sparsely pubescent and densely leaved. Proximal cauline leaves withered at anthesis, middle leaves shortly petiolate; petiole 4--5 mm; leaf blade broadly ovate, 3.4--5.5 × 4.5--5.5 cm, both surfaces glabrous, 3--5-sect; segments dissected, ultimate lobes 1--2.2 mm wide. Inflorescence 6--20 cm, 8--35-flowered; rachis and pedicels densely spreading yellow pubescent; proximal bracts leaflike or 3-fid, distal ones linear. Pedicels 2--6 mm, distally with 2 bracteoles; bracteoles lanceolate-linear, 4--5 mm, sparsely pubescent. Sepals yellow, usually greenish, sometimes blue, abaxially ± spreading pubescent; lower sepals obliquely oblong, ca. 1 cm; lateral sepals orbicular-obovate, 1.2--1.6 cm; upper sepal navicular-falcate or falcate, clawed, lower margin 1.6--2 cm, arciform-curved. Petals glabrous or sparsely pubescent; limb ca. 8 mm; lip 1.5--4 mm; spur incurved, ca. 1 mm. Stamens glabrous or sparsely pubescent; filaments entire. Carpels 5, glabrous or ovary spreading pubescent. Follicles 1.1--1.4 cm. Seeds ca. 3 mm. Fl. Jul--Sep. 2n = 16*.
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