The genus Trichodiadema, comprised of around thirty species, is found in southern Namibia and in the Northern, Western, and Eastern Cape Provinces in South Africa. The small shrubby plants are characterized by the diadems of small radiating hairs at the leaf tips. In addition, many species possess a caudiciform base or tuberous roots. They flower from winter to late spring and normally after good rains. The plants are easy to grow and prefer full sun and need adequate water during the blooming season.

Trichodiadema hallii, commonly known as Miniature Desert Rose or African Bonsai is a South African endemic species found in the Western Cape province. This species has very thick roots and compact leaves and readily produces abundant attractive pink flowers. The bristles on the tips of its leaves give this plant its generic name which means “hairy crown”. It grows into a small erect succulent shrub, up to 6 cm tall. Its leaves are succulent and end in a circle of stiff hairs, giving the plant a similar appearance to some species in the cactus genus Mammillaria. From autumn to spring it produces an abundance of vivid violet-pink to magenta flowers that only open on sunny mornings and close in the afternoon. These are up to 3 cm in diameter.