Euphorbia mammillaris

Origin Euphorbia mammillaris is native to South Africa, primarily distributed in the Little Karoo region of the Western Cape. It has been known to science since the 18th century and was officially named by Linnaeus in 1753.

Habitat In its natural environment, this species thrives in stony soils and gravelly flats within arid shrublands. It is often found growing among rocks or sheltered under larger bushes. It is well-adapted to the intense sun and low rainfall of the Karoo, using its thick, succulent stems to store water during drought.

Description Euphorbia mammillaris is a charming, low-growing succulent shrub known for its "corn-cob" appearance and geometric textures.

• Growth Habit: It is a multi-branched perennial that forms dense, mounded clumps. It typically reaches a height of 15–20 cm.

• Stems: The stems are cylindrical, about 4–6 cm thick, and usually have 7 to 17 ribs. These ribs are deeply divided into prominent, hexagonal tubercles (mammillae), which give the plant its characteristic "corn-cob" look. The epidermis is a fresh light green, often turning purplish when exposed to cold or bright sun.

• Spines (Peduncles): The "spines" are actually persistent sterile peduncles. They are grayish-brown, needle-like, and about 1 cm long. They are scattered along the ribs, primarily near the stem tips.

• Flowers (Cyathia): It produces small, solitary yellowish cyathia on the ends of the branches during the spring and summer months.

• Cultivation: This is one of the most resilient Euphorbias. It requires full sun to partial shade and a very porous mineral substrate. It is more tolerant of occasional overwatering than many other species but should be kept dry during winter dormancy.