Acmadenia sheilae is an erect, branched shrub that grows to a little more than 1 m. The leaves are ericoid, small and narrow, appearing cylindrical with bluntly rounded tips. They are not pressed to the stems, which helps to distinguish the plant from A. macropetala.
The distribution of A. sheilae lies on the middle and higher slopes of two mountain ranges only: the Swartberg on the northern perimeter of the Little Karoo and the Rooiberg near its southern border. The plant’s habitat is the arid protea fynbos and waboom vegetation found here in sandy and loamy soil.
All 33 Acmadenia species grow in some parts of the winter rainfall fynbos. This picture was taken in May on the Rooiberg (Vlok and Schutte-Vlok, 2010; Bond and Goldblatt, 1984).