Aggregatae

Manning, John C. & Goldblatt, Peter, 2001, the Arabian Peninsula and Socotra including new species, biological notes, and a new infrageneric classification, Adansonia (3) 23 (1), pp. 59-108 : 69

2. Basal fibers aggregated into distinct rounded clusters, the fibrils in each cluster converging and pointed, the roots emerging from the clusters ............................................................................... Section 4. Aggregatae

2’. Basal fibers not aggregated into clusters of converging fibrils, sometimes the basal ridge more deeply incised between groups of parallel fibers but the roots not emerging only from the fibril clusters, the fibrils more or less blunt .................................................................................................................................................. 3

3. Corms symmetrical and bell-shaped with a circular basal rim ...................................... Section 3. Hirsutae

3’. Corms obliquely flattened with a crescent-shaped basal ridge or compressed with a fan-shaped basal ridge ........................................................................................................................................................ 4