D. lanuginosum, less puberulous, with lvs. wider, more deeply cordate at the base, and clasping the branches. -D. Leachenaultidium, D. Don, differs from others here described by having white fls. India, Ceylon. B.M. 6935. -D. Pullum, Salisb. Readily told from American forms by its brown or purplish green fls. India, Java, China. B.M. 916.