Euphorbia tirucalli: "Firestick" Pencil Cactus in 6" Nursery Pot
Also known as The Milk Bush because of its thick white sap, The Pencil Cactus can grow to 6 feet indoors. Native to Africa and India it like a sunny arid climate. Although commonly referred to as a cactus it is technically a Euphorbia.
Light: It prefers that bright indirect light, but it can take the direct sun as well. Never put it in a dark corner.
Water: Unlike a lot of cacti it can require a bit more water in the spring summer. Water every 4 weeks in the winter and increase frequency to about every 2 weeks in the spring summer. Water when dry but don't forget about it.
Humdity: Can handle dry air