genus Eriodictyon ge·nu·se·riodictyon uncommon noun 1. small genus of evergreen shrubs of southwestern United States and Mexico SynonymsEriodictyongenus Eriodictyon Related words Broader terms asterid dicot genus Parts Hydrophyllaceae Part of yerba santa WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.