Senecio cotyledonis ("stinkbos") is a species of succulent flowering plant in the aster family, native to the Western Cape and Northern Cape of South Africa and to Namibia.

The flower capitula appears in Spring and has yellow ray florets.

It is large, solitary and appears in among the leaves (not held up freely in an inflorescence of numerous flowers, as in Senecio aloides).

Several related and similar looking species occur in the region, such as Senecio aloides and Curio corymbifer (syn.

The flower clusters of Senecio aloides are held up on an inflorescence, above the leaves.