Agave salmiana Otto ex Salm-Dyck subsp. salmiana var. salmiana, the typical variety of this large-growing Mexican species, is here recorded as having become established in South Africa's Eastern Cape Province. A description and key that can be used to distinguish it from A. americana L. subsp. americana var. americana and A. americana subsp. americana var. expansa (Jacobi) Gentry, both of which are large-growing and more widely naturalised in southern Africa, are provided. A comprehensive chronological synonymy summarises the complex nomenclatural and taxonomic histories of the species.
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Vol. 2012 • No. 30