Description from Flora of China
Herbs, perennial, overwintering by a resting bud. Roots numerous, 0.1-0.2 mm thick. Leaves shortly petiolate; leaf blade pale green, elliptic to broadly elliptic, 5-10(-15) × 4-8 mm, abaxially glabrous, secondary veins 4 or 5 on each side of midvein, base broadly cuneate, margin strongly involute, apex rounded. Flowers 1 or 2, from generative rosette. Pedicel 2.5-8 × 0.4-1 mm, glandular pilose. Calyx parted from base into 2 lips, outside glandular pilose, inside glabrous; lower lip 2-lobed, 0.5-1 mm, lobes ovate-lanceolate; upper lip 3-lobed, 1-2 mm, lobes ovate-lanceolate. Corolla pale violet with yellow stripes in throat, 6-9 mm; tube shortly funnelform-tubular, 2.5-3 mm, outside glabrous, inside sparsely puberulent; spur cylindric-conic, straight, longer than corolla tube, apex rounded; lobes of lower lip oblong, apex obtuse to truncate; lobes of upper lip oblong, apex obtuse. Filaments curved, 1-1.2 mm; anther thecae confluent. Ovary globose, 1.2-1.5 mm in diam.; style short; stigma lower lip semicircular and ciliate, upper lip obtuse. Capsule obovoid, 5-6 mm, glabrous. Seeds narrowly ellipsoid; seed coat with small prominent elongate reticulations. Fl. Jun-Aug, fr. Aug-Oct. 2n = 16.
Sphagnum bogs. NE Nei Mongol [Japan, Russia (Far East, Siberia); N Europe, North America].