Corolla white, lilac-blue or reddish, hairy; tube 2.5–5(6) mm. long, filiform, lobes 2–2.5 x 0.5–0.8 mm., lanceolate, filaments 1.5–2 mm. long, glabrous, anthers 0.5–0.7 mm. long; style 3.5–6 mm. long, stigma lobes l-5–1.8mm.long; ovary c. 1 x 1 mm., densely hairy.
Leaves decussate; blades (7)10–26(34) x 4–10(12) mm., elliptic or sometimes ovate, with short hairs above and longer hairs below, at least on midvein, seldom ± glabrous above; petioles c. 1–2 mm. long; stipular sheath with 3 subulate setae to 1 mm. long.
Calyx: enlarged, foliaceous lobe(s) 1(2), 3–6.5 x 1–2.5 mm., lanceolate, hairy or glabrescent, other lobes unequal, some occasionally obsolete.
Seed brownish, 1–1.5 x 1 mm., (sub)globose, dorsal side convex, ± keeled, ventral side concave.
Stems 6–15(20) cm. long, ± erect, often unbranched, hairy all over or with 2 rows of hairs.
Perennial tufted herb with few to c. 20 stems from a ± woody rootstock.
Fruit yellowish-brown to dark brown; mericarps c. 2 x 1.5 mm.
Inflorescence several-flowered, head-like, c. 1 cm. in diam.
Bud with limb abruptly expanded into an ovoid head.