The genus Aloe is common in Kenya, with about 60 taxa recognised. Observations from this study indicate that most of the taxa have a restricted distribution, with only Aloe secundiflora var. secundiflora being widespread in the country. The diversity patterns indicate a high concentration of taxa in three areas that are identified as Aloe hot spots and thus of high priority for conservation of the genus: The Kulal–Nyiro–Ndotos–Marsabit area in the north, the Taita–Shimba Hills zone to the southeast and the Naivasha–Baringo area in the Rift Valley. Most of the microendemic taxa are concentrated in the Kulal complex, a few in the Taita complex while the Naivasha complex includes mainly the widespread ones. Based on the computed Extent of Occurrence (EOO) and the threats to individual populations of endemic taxa about 36% were assessed as being Critically endangered, 32% as Endangered, 12 % as Vulnerable, 12% as being Near Threatened and 8% of Least Concern, according to IUCN Red Listing Criteria.
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Vol. 95 • No. 2