| Noun | 1. | groundsel tree - a shrub of salt marshes of eastern and south central North America and West Indies; fruit is surrounded with white plumelike hairy tuftsBaccharis, genus Baccharis - shrubs of western hemisphere often having honey-scented flowers followed by silky thistlelike heads of tiny fruits; often used for erosion control bush, shrub - a low woody perennial plant usually having several major branches | |