Page:Wayside and Woodland Blossoms.djvu/224

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We have explained (page ) in what respect the Scabious differs from the somewhat similar flowers of Composit&aelig;, and to a considerable extent that explanation will hold good for the genus Dipsacus, which is united to Scabiosa in the Natural Order Dipsace&aelig;. There is this difference, however: in Dipsacus the flower-bracts end in long, straight, sharp points, and the involucel is four-angled. There are two British species:&mdash;