Waterleaf family plants are mostly herbs, a few shrubby, with mainly alternate leaves. The tubular flowers are 5-parted and are often on coiled stems. The 5 stamens alternate with the lobes of the flower tube. There are 2 styles, a superior ovary and the fruit is a capsule.
There are 18 genera and about 250 species in this family. (Bailey 828).
The entire family, Hydrophyllaceae, is proposed to be in Boraginaceae. (Robert’s, The Vascular Plants of Orange County California. 100. Upper Newport Bay species within the family: