Euphorbia atroviridis is endemic to the area north of Klaarstroom and around Rietbron in the semi-desert Great Karoo. It is a medusa-head Euphorbia with a considerable tap root. Euphorbia atroviridis slowly branches with age.
A 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 atroviridis may be part of a larger complex of related Euphorbia species.
Euphorbia atroviridis, an old cultivated plant.
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