Pisonia
genus of often thorny tropical trees and shrubs and some vines; mainly America • Syn: genus Pisonia • Hypernyms: caryophylloid dicot genus • Member Holonyms: Nyctaginaceae, family Nyctaginaceae, Allioniaceae, family Allioniaceae, four-o'clock family • Member Meronyms: cockspur, Pisonia aculeata
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