European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage

European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that stick straight up; often grown for forage

shore-dwelling seaweed-eating lizard of the Galapagos Islands

shore-dwelling seaweed-eating lizard of the Galapagos Islands

prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses

prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses

prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses

prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses

prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses

prolific South American aquatic weed having grasslike leaves and short spikes of white flowers; clogs waterways with dense floating masses