Native to Zimbabwe and other regions of east Africa, this ground-covering perennial may be somewhat trailing or it may develop into a small shrub up to about 0.2 m high. Its wiry stems, branches and calyces are covered in long silvery hairs. Flowers are a bright, clear blue with white centres and are carried singly along the stems. In the garden it will often reach a height of 40 cm especially when regularly watered and fertilised.