Definition that contains adventive
- hemlock large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous
- yellow star-thistle European weed having a winged stem and hairy leaves; adventive in the eastern United States
- musk mallow erect Old World perennial with faintly musk-scented foliage and white or pink flowers; adventive in United States
- conium maculatum large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous
- aralia elata deciduous clump-forming Asian shrub or small tree; adventive in the eastern United States
- poison hemlock large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonous
- wall rocket yellow-flowered European plant that grows on old walls and in waste places; an adventive weed in North America
- malva moschata erect Old World perennial with faintly musk-scented foliage and white or pink flowers; adventive in United States
- caper spurge poisonous Old World spurge; adventive in America; seeds yield a purgative oil
- myrtle spurge poisonous Old World spurge; adventive in America; seeds yield a purgative oil