slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects
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 pinlike 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
