(var.) Taxonomic rank (varietas) grouping variants of a species with relatively minor differentiation in a few characters but occurring as recognisable populations. Often loosely used for rare minor variants more usefully ranked as forms.
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A group-name for forms with larger leaves than in the typical variety, to 5 in. wide, usually seven-lobed, the lobes ovate-oblong, broadest about the middle, more finely toothed than in the type. Such forms are found wild in Japan. The clones ‘Elegans’, ‘Rubrum’, and ‘Osakazuki’ belong here. Selected forms of this variety are in commerce in which the autumn colour is brilliant crimson.