Pencil Cactus, Firesticks
Pencil-like stems. Will grow to a fully branched 20ft. tall tree where hardy outside in the ground. Grows well indoor as a houseplant, 7 to 8 ft. tall. Red-tipped in full sun. The milky latext sap is poisonous and can cause skin irritation. One of the most poisonous houseplants. Keep away from children.