This species was discovered in 1925 by Dr. John Muir and was described 4 years later by Dr. Marloth.
Origin: It is endemic to a few limited areas in little Karroo. Landsmith district, Cape Province, South Africa
Habitat: They grows in small population, sometime with only a few individual on very sandy and stony ground, often with white quartz on the surface. They are found either on open places or partially under the shade of small bushes. Most of the plants are cryptic (grows completely underground with only the tips of the stems above the ground level) while some grow totally above the ground and are shaped like a half-sphere or a cushion (like in cultivation).
Conservation status: Listed in CITES appendix 2.
Etymology: It was was named after Dr. Muir 's wife: Susanna, the wife of the discoverer of this species. By the way, this woman's name was (according to some writers) Suzanna, with a z, and named the plant Euphorbia suzannae.