green plant having a vascular system: ferns, gymnosperms, angiosperms

plants that are grown for their produce

abounding with or resembling weeds

clear of weeds

European annual having large trumpet-shaped reddish-purple flowers and poisonous seed; a common weed in grainfields and beside roadways; naturalized in America

widely distributed low-growing Eurasian herb having narrow leaves and inconspicuous green flowers

small European weed with whorled leaves and white flowers

prostrate weedy herb with tiny pink flowers; widespread throughout Europe and Asia on sand dunes and heath and coastal cliffs; naturalized in eastern North America

annual prostrate mat-forming weed having whorled leaves and small greenish-white flowers; widespread throughout North America