This is often sold as a true species, but it is a hybrid presumably between Aloe humilis var. echinatum and Aloe arborescens. This is a suckering, mounding shrub up to about 3' tall and maybe twice as wide. Leaves are intensely spiny (in a relatively harmless, soft way, the way Aloe humilis is spiny) of light green to bluish0green, somewhat bendable leaves. Flowers are bright red in fairly compact, conical racemes on an unbranched pedicle. I have found this an easy plant to grow, but also an aloe mite magnet.
Source: Agaveville