Aloe grandidentata, the bontaalwyn in Afrikaans, has a leaf rosette that looks quite similar to those of many of the other stemless, spotted or maculate aloes. Its flowers are, however, quite unique. They lack the basal swelling of the perianth. Their perianths are club-shaped or clavate, i.e. the individual flowers or perianth tubes are larger at the apex, the tip, than at the base.
Leaf surfaces are covered in white markings, often arranged in transverse rows. The lower surface often has more of these markings. The leaves have horny edges and stout, sharp, hooked or straight teeth, while the leaf surfaces are smooth. The plant tends to grow suckers with a secondary rosette at its tip, thus forming a cluster.
The plant is a common garden subject and grows well in cultivation. The natural habitat includes much of the western summer rainfall areas of the interior of South Africa and also Botswana (Jeppe, 1969).