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
slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects
Any of the parasitic nematode worms of superfamily Filarioidea that live in the blood of vertebrates and is transmitted by insects: the cause of filariasis.