Russelia Jacq.

Small, wiry shrubs, sometimes appearing herbaceous, the stems mostly ridged or angled, glabrate or pubescent. Leaves opposite or verticillate, membranaceous to coriaceous, ovate to lanceolate, sometimes reduced and caducous, entire, serrate or deeply incised, venation pinnate, sometimes glandular dotted; petioles present or wanting, mostly short; stipules wanting. Inflorescences axillary cymose clusters, mostly pedunculate; bracts foliaceous, reduced upwards on the flowering stems; bractlets narrow, sessile, mostly pubescent; pedicels slender. Flowers showy red or pink, rarely white; calyx 5-lobed to near the base, the lobes apically narrow, mostly with hyaline margins; corollas tubular, slightly bilabiate, the mouth mostly not spreading, mostly glabrous outside, mostly pubescent near the mouth and at the point of the stamen insertion within; stamens 4, didynamous, included, the filaments inserted just above the base of the tube, often pubescent