Herbs, perennial, 15-45 cm tall, with small to medium 1-celled hairs abaxially on leaves, and more densely in raceme, rarely glabrous; stems and petioles of radical leaves attenuate to filiform underground base. Storage roots several, fascicled, spindle-shaped, 1-2 cm × 2-4 mm, gradually narrowed into thick stalk. Stems 1-3, simple or very rarely with 1 branch, with 2-4 leaves. Radical leaves not seen. Lower cauline leaves: petiole 1-4 cm; blade pruinose abaxially, green adaxially, broadly ovate, 6-14 × 5-12 cm, pinnate with 2-4 pairs of pinnae; pinnae narrowly lanceolate to linear, 1-6 cm × 3-5 mm, entire, rarely lowest segment 2-or 3-divided; upper leaves much smaller with more crowded leaflets, sessile. Raceme dense, 15-35-flowered, subsecund; bracts 10-20 × 4-14 mm, deeply pectinate-flabellate with some lobes again divided, segments linear-acute. Pedicel 8-10 mm, soon spreading-arcuate, sharply recurved in fruit. Sepals white, orbicular to triangular, 1-2 × ca. 2 mm, richly dentate. Petals lemon yellow or sometimes with an orange tint; veins often not obvious; outer petals broadly elliptic, subobtuse, margin slightly undulate; crest very broad, obtuse, much overtopping apex, long decurrent on spur; upper petal 20-24 mm; spur strongly incurved at apex, sigmoidally curved, cylindric, 12-15 mm; nectary 7-10 mm; lower petal broadly navicular-saccate, 9-12 mm; inner petals 8-10 mm. Stigma square, slightly emarginate; median 2 apical papillae distinct, lateral marginal papillae confluent; geminate papillae submarginal and on basal lobes; style 2-3 mm, apex bent. Capsule narrowly obovoid, 8-10 × ca. 2.5 mm. Seeds ca. 1.5 mm, smooth. Fl. and fr. Jun-Sep.
Home