Blue flowers resembling morning glory. Several of the best-known Thunbergia species are climbers, but this native of tropical Africa is a sprawling shrub, very useful in mixed beds or as a low hedge. It has attractive, small, dark green leaves and tubular flowers which in the most common form are rich purple with a yellow throat; there is also a white-flowering form, which seems to have smaller leaves and is somewhat less robust . T. erecta responds well to regular pruning and can be shaped into a very bushy shrub, though this inhibits blooming. It prefers full sun and well-drained soil but will bloom in partial shade. Propagtion is by means of cuttings.