Aloe archeri, A. rendilliorum and A. tugenensis are very similar in morphology and leaf exudate chemistry but occupy separate geographical locations in northern Kenya. Here they are treated as subspecies of one species, for which A. archeri is the earliest name. Aloe tugenensis had already been reduced to subspecies rank, and the new combination A. archeri subsp. rendilliorum is proposed here. An identification key is provided. Together with three other species in eastern Africa they are possibly a local neoendemic group.