Flora Zambesiaca: Habit
Shrub; cystoliths present.
Leaves
Leaves variegated, either green and yellow or dark green and pink, elliptic, base cuneate to attenuate, apex shortly acuminate, glabrous.
Flowers
Flowers held in a short terminal thyrse; bracts and bracteoles inconspicuous, lanceolate, 2–3 mm long.
Calyx
Calyx of 5 ± equal lanceolate lobes c.4 mm long.
Corolla
Corolla deep reddish-purple, 35–40 mm long, tube gradually expanded to mouth, curved, to c.25 mm long; limb 2-lipped, upper lip 2-lobed, lower lip divided into 3 oblong lobes.
Stamens
Stamens 2, exserted, bithecous, thecae at equal height; staminodes 2.
Distribution
Native of the Indo-Pacific region, though its exact native distribution apparently unknown. Very widely cultivated in the tropics. Flora of West Tropical Africa: Habit
A glabrous shrub
Leaves
Variegated leaves, often copper-coloured (see note below)
Flowers
Red-purple tubular flowers 1-11/2 in. long in narrow panicles
Note
Planted in gardens as an ornamental.

1) Exotic from New Guinea: http://www.plantsoftheworldonline.org/taxon/urn:lsid:ipni.org:names:49186-1