genus Pisonia

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Noun1.genus Pisonia - genus of often thorny tropical trees and shrubs and some vines; mainly America
caryophylloid dicot genus - genus of relatively early dicotyledonous plants including mostly flowers
Allioniaceae, family Allioniaceae, family Nyctaginaceae, four-o'clock family, Nyctaginaceae - a family of flowering plants of the order Caryophyllales
Pisonia aculeata, cockspur - small spiny West Indian tree
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The mainly tropical genus Pisonia includes approximately 40 species, with the greatest species-richness in the Americas (Mabberley, 1997).