Native to a wide swath of central and southern Africa, Aloe zebrina is an aggressively clumping, beautifully marked Aloe, with rosettes that get to about 18 inches in diameter. The older leaves darken to a deep greenish purple and turn red at the tips in winter. They are heavily armed with sharp teeth and patterned with lighter green markings. Aloe zebrina grows fast and offsets like crazy. I made the mistake of planting some of this in the yard and within a couple seasons had a large unmanageable patch. It produces underground shoots that can pop up several feet away from the plant. The scarlet flowers with yellow tips appear on branched flower stalks up to 3 feet high in several flushes over summer.
     I potted up a single pup from a patch of this growing in front of a rental home I lived in about 15 years ago. It's been with me ever since. Not that same plant but about 10 generations of it's descendants. I confine them to pots now as they are way too invasive in the ground. Even potted they offset aggressivelly and I have to repot them every year and clear the pups out. It's a bit of a chore, but worth it, because the plant is beautiful and almost indestructable. It withstands any amount of neglect or abuse. Except for cold. The leaf tips die back a bit and need to be broken off in spring. But by mid summer the plant is gorgeous again.