Herbs, perennial, 8-20 cm tall, glabrous; stems and petioles of radical leaves attenuate to filiform underground base. Storage roots fasciculate, fusiform to cylindric, 1.5-2 cm × 4-5 mm, sessile. Stems 1 or 2, simple, with 2 leaves in upper 1/3. Radical leaves not seen. Cauline leaves subsessile, ternate with shortly stalked ternate or binate leaflets; lobes lanceolate to linear, apex obtuse to usually acute or acuminate. Raceme 2-4 cm, densely 6-11-flowered; bracts ovate, 8-20 mm, entire, acuminate. Pedicel arcuate, 7-17 mm. Sepals whitish, 0.2-0.5 × 0.5-1 mm, dentate. Petals yellow; inner petals with contrasting dark purple tip; outer petals with very narrow to rather broad crest, reaching or sometimes overtopping apex; upper petal triangular-ovate, 18-25 mm, with broad base; crest shortly and narrowly decurrent on spur; spur cylindric at base, 10-15 mm, attenuate to a rather thin slightly downcurved apex; nectary ca. 1/2 as long as spur; lower petal 11-13 mm, apical part triangular, acute, with crest often overtopping apex, whole basal 1/2 broadly and conspicuously saccate; inner petals 10-12 mm. Stigma square, slightly emarginate; median 2 apical papillae narrow, lateral marginal papillae broad, indistinct; geminate papillae lateral and on well-developed basal lobes. Fruit not seen; ovules to 32, in 2 rows; style 3-4 mm. Fl. May-Jul.
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