This member of the Crassulaceae family was given this name by Stephen Ward McCabe in 1977. It is found on the eastern Santa Rosa Island in south-western USA, growing in a well drained soil like volcanic gravel and sand with some water in winter and lots of sun. The caudex can grow to two centimetres in diameter, the entire plant to ten centimetres in height. The flowers are yellow. This is a winter grower in the wild. The genera honours Professor William R. Dudley, 1849-1911, a US-American botanist at Standford University. The specific epithet refers to the small size. Habitat by James Bailey, Inaturalist.org. Wild plant by James Bailey, Inaturalist.org.

