Erect herbs from 20-50cm high; stems simple and translucent succulent. Leaves very thin. Flowers on curving down pedicels, red or occasionally green (white-flowered plants). Corolla c. 3 x 3cm, apricot, rose-magenta or white (occasionally), very irregular, with its shield-like upper lip and 2 lobes and with flattened wide, irregular lateral petals. Corolla spur 1.7-1.9cm long, very slender.