Asystasia gangetica subsp. micrantha or A. intrusa

Asystasia gangetica subsp. micrantha, commonly African coromandel or creeping foxglove, is a spreading perennial forming a groundcover that reaches heights from 30 cm to 60 cm. This is the only subspecies of A. gangetica occurring in South Africa. The specific name, gangetica, is derived from the Ganges River in India.

Photos of this plant in iNaturalist go under the name A. intrusa (and African coromandel), as do the ones called A. pinguifolia, deemed a synonym. At the time of writing SANBI did not use the name A. intrusa.

The stems root at the nodes, sometimes too energetically for some gardener tastes and invade, a particular problem in tropical regions, including some of the Pacific Islands. 

The plant's distribution in South Africa is in the east of the country, from the Eastern Cape to KwaZulu-Natal and inland in Mpumalanga and Limpopo. The plant is also common in big parts of tropical Africa and Asia, although the Asian plant usually has pink flowers. It is well established in the planted garden part of the Fernkloof Nature Reserve and in the nursery.

The habitat is woodland and forest, the plants thriving in semi-shade. The habitat population is deemed of least concern early in the twenty first century.

This fast-growing, long-flowering plant is not only welcome in some flower gardens but eaten as a spinach. Beetles eat the flowers, while butterflies and black ants are keen visitors (Pooley, 1998; Leistner, (Ed.), 2000; iNaturalist; http://pza.sanbi.org; http://redlist.sanbi.org).