- Pisonia, genus Pisonia - genus of often thorny tropical trees and shrubs and some vines; mainly America
--1 is a kind of caryophylloid dicot genus
--1 is a member of
--1 has members: cockspur, Pisonia aculeataNyctaginaceae, family Nyctaginaceae, Allioniaceae, family Allioniaceae, four-o'clock family