Adrian Hardy Haworth: A new Arrangement of the Genus Aloe, with a chronological Sketch of the progressive Knowledge of that Genus, and of other succulent Genera. In: Transactions of the Linnean Society of London. Band 7, Nummer 1, London 1804, S. 9 (online).
google.de
books.google.de
Adrian Hardy Haworth: Synopsis plantarum succulentarum cum descriptionibus synonymis locis, observationibus anglicanis culturaque. R. Taylor, London 1812, S. 94 (online).
