[1] The species is named in honour of Nathaniel Wallich, early 19th century Danish plant hunter, botanist and physician.

Greyish branches are densely covered with residual leaf bases (phyllopodia) up to 1.5 cm long and crowded leaves on their tips.

Plants blossom during summer, producing spreading to pendent clusters of dangling yellowish-green, urn-shaped flowers of 7-12 mm long with spreading to recurved lobes.

[4] Gravelly or sandy slopes of South Namibia and RCA from Namaqualand into the Great and Little Karoo.

[1] The plant contains bufadienolide-type cardiac glycoside cotyledoside which causes nenta poisoning ("krimpsiekte") in livestock.