Crassulaceae J.St.-Hil.

Crassula sect. Helophytum Toelken

, legitimate

, scientific

Toelken, H.R. (1977), A Revision of the Genus Crassula in Southern Africa.

Contributions from the Bolus Herbarium

8(1)

:

84

[comb. nov.]

Toelken, H.R. (29 April 1981), The species of Crassula L. in Australia.

Journal of the Adelaide Botanic Gardens

3(1)

:

57-80 (65-70)

[secondary reference]