FIGURE 2. A in Aloe ×engelbrechtii (Asphodelaceae subfam. Alooideae), a new South African nothospecies with A. arborescens and A. hardyi as parents

FIGURE 2. A. The rosettes of Aloe ×engelbrechtii are intermediate between those of its parents, A. arborescens and A. hardyi, and vary from light green (left) to glaucous (right). B. The inflorescences of A. ×engelbrechtii are shorter and more laxly flowered than in A. arborescens. C. Various aloes, including A. hardyi, cultivated in the dry green wall on a section of the north-facing exterior of the Plant Sciences Building of the University of Pretoria. Aloe ×engelbrechtii, which is a horticulturally useful nothospecies, flourishes when cultivated in such vertical positions. All photographs: Gideon F. Smith.