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|Noun||1.||genus Parthenium - small genus of North American herbs and shrubs with terminal panicles of small ray flowers|
asterid dicot genus - genus of more or less advanced dicotyledonous herbs and some trees and shrubs
aster family, Asteraceae, Compositae, family Asteraceae, family Compositae - plants with heads composed of many florets: aster; daisy; dandelion; goldenrod; marigold; lettuces; ragweed; sunflower; thistle; zinnia
guayule, Parthenium argentatum - much-branched subshrub with silvery leaves and small white flowers of Texas and northern Mexico; cultivated as a source of rubber
Parthenium hysterophorus - tropical American annual weed with small radiate heads of white flowers; adventive in southern United States
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