Glabrous, shrubby. Branches subdichotomous, subdivaricate, terete, above compressed and dark purplish. Leaves ovate-elliptical, attenuate at both ends, venose, shortly petiolate, green on both sides, in the dry specimens dark green above pale green below, 1–1 1/2 in. long; stipules interpetiolar, ovate, acute, persistent, 1/6 in. long. Corymbs fastigiate, axillary and terminal; peduncles bifid, many flowered; bracts sublanceolate, acute, minute, at the forks, dark purplish. Calyx minute, obsoletely or obtusely 5-toothed. Corolla tubular; tube cylindrical, rather curved inwards, nearly 1/4 in. long; lobes 5, ovate, rather acute.