The Mexican Agave americana L. subsp. americana var. expansa (Jacobi) Gentry, a distinctive variety of the widely cultivated, blue-leaved century plant, is here recorded as having become established in South Africa. A description and key that can be used to distinguish it from A. americana (subsp. americana) var. americana, which is more widely naturalized in South and southern Africa, is provided.
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Vol. 2011 • No. 29