Nemesia caerulea, the Drakensberg nemesia, is a perennial herb with scented, blue or purple flowers. Flowers grow on erect leafy racemes from leaf axils. Corollas are two-lipped in typical Nemesia fashion, without the yellow bumps on the lower lip. Flowering comes by midspring and early summer.
The plants have a compact growing habit; a blooming one may be densely covered in flowers. The dark green, serrated leaves are ovate, tapering to acute tips.
Nemesia caerulea is found in southern KwaZulu-Natal, the north-eastern extreme of the Eastern Cape, the north-eastern Free State and Lesotho. The habitat is montane grassland among rocks (Manning, 2009; Wikipedia).