Chaenostoma subnudum is a perennial, wiry shrublet that grows to 50 cm. Its leaves are opposite, linear to lanceolate, long and narrow with the margins rolled under. The flowers are mauve-pink with a funnel-shaped orange throat from which the four stamens protrude notably. The five petals have rounded tips and parallel sides. Flowering can be seen in spring and summer.
The species is endemic to the Little Karoo, particularly the Oudtshoorn-Calitzdorp area and the northern slopes of the Outeniqua Mountains. The plant grows in clayey and sandy soils, abundantly in renosterveld. The plant is not threatened. It resprouts after fires (Vlok and Schutte-Vlok, 2010).