Mal Karvy is a small perennial shrub, usually half a meter tall, but after the flowering year, grows to 2 m tall. Oppositely arranged stalkless leaves are ovate, rounded at the base, 2-3 cm long. Purple flowers occur in spikes 3-8 cm long, either in leaf axils or at the end of branches. Bristly bracts are 2 cm long, with long hairs, and tinged with purple. Flowers are bell-shaped with flaring petals. Stamens are 6 in number, and remain inside the flower.