The dragon's blood plant (Dracaena draco) is a subtropical tree in the genus Dracaena, native to the Canary Islands. It is not the most beautiful, but it has the single most important quality for your indoor foliage: it is tough beyond all measure.
Dracaena draco has somewhat severe, stiffly pointed leaves that end in something resembling a spike. The leaves are solidly green, and the plant will grow to a height of three or four feet indoors. The dragon's blood name comes from the fact that it exudes reddish resin from wounds and nicks. As a point of interest, it is said that this resin was used as a wood dye to stain the famous Stradivarius violins. It is a member of the agave family and is related to the yucca and century plant.