(This plant comes in a 3.5" pot. You will receive a very similar plant to the one in the picture. It may or may not be blooming at the time of your purchase. The plant is shipped in its pot to prevent any damage to the roots).
This kind of Euphorbia is a great option for growing it on a pot. It will form a small, knobby spherical emerald green stems about 1" in diameter. Clusters profusely to form wide clumps that can get up to 10" in diameter. Each stem produce a soft "toothed" ridges along the margins, and often has deciduous leaves during active growth.
Recommended temperature zone: USDA: 10-11
Frost tolerance: Hardy to 30° F. (-1°C)
Minimum avg. temperature: 50°F (10°C)
Sun exposure: Light shade
Origin: Cape Province, South Africa
Growth habits: Clumping or solitary succulent, 4" tall (10 cm)
Watering needs: No water from November to March
Propagation: Seeds (give nicer plants) or cuttings.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz