Euphorbia tirucalli pencil cactus
(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 colorful succulent is also known as the pencil cactus. Needs to be handled with caution. It contains a sap that can produce severe irritation and is toxic and may cause problems in some people
Full sun, drought tolerant. It is an excellent houseplant that will grow pretty fast up to 30' tall.
It needs to be protected from frost.
Some of the information in this description has been found at desert-tropicals.com, llifle.com and cactus-art.biz