Plants perennial, efarinose, pubescent to hairy, with a slender rhizome. Leaves cauline (including the petiole), 4-12 x 1.6-5 cm, ovate to obovate, irregularly dentate, ± membranous, glandular pubescent, the hairs articulate-pilose and short stipitate. Lamina tapering into the petiole. Scapes 1-4(-8), (1.5-)5-13 cm long, glandular-pubescent. Bracts leafy, 7-25 x12 mm, ovate to suborbiculate, irregularly dentate. Pedicels 14-25(-38) mm long, slender, usually exceeding the bracts, glandular-pubescent. Flowers heteromorphic or homomorphic and in superposed whorls of 2-5, yellow. Calyx 5-6 mm long, campanulate and up to 10 mm in fruit, glandular-pubescent. Lobes 4-6 mm long, ovate to sublanceolate, unequal, acute or subacuminate, green, slightly reflexed in fruit. Corolla tube exceeding the length of the calyx, pubescent on the outside; lobes obovate, 2-fid at the apex. Limb up to 20 mm broad, throat exannulate. Anthers c. 2 mm long, oblong. Style 4.5 mm long (in pin-eyed flowers up to 7.5 mm). Capsule subglobose to ovoid, included in the calyx. Seeds less than 0.5 mm long, angled, vesiculose, brownish-black.