Origin and Habitat: Euphorbia atroviridisSN|34753]]SN|34753]] is endemic to the area north of Klaarstroom and around Rietbron.
Habitat: Euphorbia atroviridisSN|34753]]SN|34753]] grows in the semi-desert Great Karoo, a low rainfall area, where the rains spread over the autumn and spring.

• Euphorbia atroviridis n.n.

• Euphorbia gorgonis A.Berger
• Euphorbia atroviridis n.n.

Description: Euphorbia atroviridisSN|34753]]SN|34753]] n.n. J & R 359 Seekoegat is an undescribed name (never published). It refers to an old cultivated plant widely available in culture. Originally distributed as Euphorbia species nova De Lange 163, and later provided with the provisional name atroviridis. E. 'atroviridis' is a medusa-head Euphorbia with a considerable tap root. E. atroviridis slowly branches with age. Euphorbia atroviridisSN|34753]]SN|34753]] is a close relative of the gorgonis-like species, striking feature of Euphorbia atroviridis is that the involucre glands partly bend backwards as compared to other medusae-heads of the central Great Karoo. Larger plants with similar flowers have been found many kilometers to the east in the vicinity of Pearston. This may be an indication that Euphorbia atroviridisSN|34753]]SN|34753]] may be part of a larger complex of related Euphorbia species.

Bibliography: Major references and further lectures
1) Euphorbia atroviridis in: Succulenta, 2004
2) Euphorbia atroviridis in: Desert Plants web: http://desert-plants.blogspot.it/2009/09/euphorbia-atroviridis.html