distinguish taxa. The species is treated here in the broad sense following T. G. Tutin (1968) and R. Govaerts et al. (2000). Both dioecious and monoecious populations
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Miller and U. procera Salisbury. This treatment follows that of Tutin and colleagues (T. G. Tutin et al. 1964-1980, vol. 1, pp. 65-66), in which the species
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Alan T. Whittemore Synonyms: Ranunculus auricomus subsp. boecheri Fagerström & G. Kvist Ranunculus auricomus subsp. glabratus (Lynge) Fagerström & G. Kvist
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and the mistake was perpetuated in both editions of Flora Europaea (T. G. Tutin et al. 1964–1980, vol. 1; 1993+, vol. 1). Alnus incana subsp. rugosa hybridizes
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a single species, possibly with two subspecies, as in Flora Europaea (T. G. Tutin et al. 1964–1980, vol. 1), appears to be more appropriate. The problem
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widely used for this species, is invalid (H. N. Moldenke 1937). Some (T. G. Tutin et al. 1964–1980, vol. 5) retain E. aquaticum (Hill) Druce as the valid
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plants as subsp. taraxaciflora (Thuiller) Thellung, which some Europeans (T. G. Tutin et al. 1964–1980, vol. 4) have listed as a synonym of subsp. haenseleri
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Botanical Congress in Edinburgh in 1964 that volume 1 of Flora Europaea (T. G. Tutin et al. 1964-1980) was soon to be published, North American botanists considered
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drawn from the more complete data compiled by G.L. Stebbins and J.C. Dawe (1987) from Flora Europaea (T.G. Tutin et al. 1964--1980). Polyploidy in itself does
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