Perrier de la Bathie (1926) described Aloe deltoideodonta var. intermedia Perrier for a plant collected W. of Betroka, Madagascar. Later Reynolds (1957) mistakenly concluded that a plant collected N. of Zazafotsy, in the highlands of Madagascar, also represented Perrier's variety, but believed it deserved specific status and published the new combination A. intermedia (Perrier) Reynolds. Later it was shown that this name is invalid because it is predated by A. intermedia Haworth, so the replacement name A. subacutissima Rowley was published. Here it is shown that the plant described as A. intermedia (Perrier) Reynolds is not the same as Perrier's original variety, and it is redescribed as a new species, A. newtonii J.-B. Castillon.