Trichodiadema barbatum is a low-growing plant of the Aizoaceae or mesemb family. It is found in the Little Karoo. The flowers have magenta petals and yellow centres, like many Aizoaceae or vygie plants. The unusual feature of Trichodiadema plants is in the funny clusters of tiny bristles at the top of each cylindrical, succulent leaf. The diadem or crown suggested in the generic name is in this case enhanced by the plant's bearded look resulting in the specific name of barbatum.
The plant commonly grows in full sun, covering a small area by spreading. The flowers appear towards the end of winter.