alligator weed

alligator weed

n. An aquatic South American perennial plant (Alternanthera philoxeroides) having opposite, lance-shaped leaves and small whitish flowers. It is a weed that invades warm, freshwater habitats in the southeast United States, Australia, and elsewhere.

Thesaurus

Noun

1.

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