Plants 30-40 cm tall. Flowers 4-7 cm wide in a loose arching spike of 4-10. Perianth upturned, trumpetshaped, white to red with prominent darts; lobes usually with very wavy edges. Spring.
The original G. colvillei Sweet was an F1 hybrid of G. tristis and G. cardinalis having deep pink flowers with a cream stripe on each of the lower perianth lobes. However, other S African species such as G. carneus may have contributed to this group.