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In page Aloidendron barberae:

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Aloidendron barberae was first collected and submitted for classification by Mary Elizabeth Barber, who was a plant collector in the former Transkei. She sent specimens of the plant and its flowers to the Royal Botanic Gardens at Kew, where in 1874 it was named by William Turner Thiselton-Dyer (1843–1928) in her honor. Subsequently, it was also found in KwaZulu-Natal by the well known traveller, explorer and painter Thomas Baines in 1873. He also sent a specimen to Kew, where it was named Aloe bainesii.[1] Although known as A. bainseii for many years, Aloe barberae was the name first given to this plant, and takes precedence according to the International Code of Botanical Nomenclature,[2] and so is the epithet used in the combination Aloidendron barberae.[3]