The Families of Flowering Plants - Ceratophyllaceae S.F. Gray The Families of Flowering Plants L. Watson and M. J. Dallwitz Ceratophyllaceae S.F. Gray Habit and leaf form . Plants rootless . With neither basal nor terminal aggregations of leaves. Leaf anatomy .
Minor leaf veins without phloem transfer cells.
Stem anatomy . Secondary thickening absent. Xylem without vessels. Reproductive type, pollination . Fertile flowers functionally male and functionally female .