alligator weed

alligator weed

n.

An aquatic South American perennial plant (Alternanthera philoxeroides) having opposite, lance-shaped leaves and tight clusters of small whitish flowers. It is a mat-forming weed in warm, freshwater habitats, such as the southeast United States.

Thesaurus

Noun

1.

alligator weed - prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses alligator grass, Alternanthera philoxeroides Alternanthera, genus Alternanthera - genus of low herbs of tropical America and Australia; includes genus Telanthera weed - any plant that crowds out cultivated plants