Perennial with erect stems to c. 50 cm high; vegetative parts almost glabrous. Leaflets 18-22 (fewer in sub-floral lvs), sessile, 6-25 × 1-8 mm, linear-lanceolate or lanceolate; base broad-cuneate or rounded; apex acute. Cymes terminal, finely glandular-hairy, with up to 15 fls; lowest fls subtended by pinnate bracts with 3-7 leaflets. Pedicels usually < calyx at anthesis. Calyx 4-6 mm long; segments ovate-oblong, obtuse to subacute. Corolla ± rotate, c. 15 mm diam., white; tube c. 4 mm long; lobes rounded. Stamens with basal tuft of hairs. Style > stamens. Capsule 5-7 mm long, broad-ovoid, included in calyx tube. Seed 2.5-3 mm long, acutely 3-angled.