The Families of Flowering Plants L. Watson and M. J. Dallwitz Clethraceae Klotzsch. Habit and leaf form . Leaves exstipulate . Lamina margins serrate, or dentate, or entire. Leaf anatomy .
Minor leaf veins without phloem transfer cells.
Stem anatomy . Internal phloem absent. Included' phloem absent. Wood parenchyma apotracheal. Reproductive type, pollination .