Harveya capensis, in Afrikaans the witinkblom (white inkflower), is a slender perennial that reaches heights around 40 cm.
A slight pink tinge may be seen on the large, wavy, commonly white flower corollas that measure about 3 cm across. The flowers grow in loose racemes. Flowers have curved, funnel shapes with yellow throats resembling keyholes. The flower tube or funnel is narrowed on the sides and about 3 cm long.
The flowers are scented at night, suggesting moth or other nocturnal insect pollinators. Flowering happens in late spring and summer.
The species distribution ranges across the southern parts of the Western Cape from the Gifberg to Gqeberha in the Eastern Cape.
The habitat is fynbos where the plants grow on sandstone slopes and flats. The species is not considered to be threatened in its habitat early in the twenty first century (Vlok and Schutte-Vlok, 2015; Manning, 2007; iNaturalist; http://redlist.sanbi.org).