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Related to alligator weed: Alternanthera philoxeroides
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.
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|Noun||1.||alligator weed - prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses|
Alternanthera, genus Alternanthera - genus of low herbs of tropical America and Australia; includes genus Telanthera
weed - any plant that crowds out cultivated plants