Garland, M.A.; Moore, G. 2012: ×Hesperotropsis, a new nothogenus for intergeneric crosses between Hesperocyparis and Callitropsis (Cupressaceae), and a review of the complicated nomenclatural history of the Leyland cypress. Taxon 61(3): 669.
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Garland, M.A.; Moore, G. 2012: ×Hesperotropsis, a new nothogenus for intergeneric crosses between Hesperocyparis and Callitropsis (Cupressaceae), and a review of the complicated nomenclatural history of the Leyland cypress. Taxon 61(3): 669.