Orobanche ludoviciana
Family: Orobanchaceae
Louisiana broom-rape, prairie broom-rape
Orobanche ludoviciana image
Emmet J. Judziewicz  
Etymology: Orobanche: from Greek orobos, a kind of vetch, and anchone, "choke or strangle" because of a parasitic habit, this was the Greek name of a plant that was parasitic on vetch
Plants: erect, annual, 4"-12" tall forb, usually unbranched; parasitic on roots, especially Artemisia and other members of Aster family
Leaves: many, scale-like
Flowers: purplish, 5-parted, 1/2"-1" long, cup-shaped, 2-lipped: upper lip 1-lobed and almost straight, lower lip 4-lobed; inflorescence a many-flowered, dense spike usually about 1/2-2/3 of the entire plant; blooms June-Aug.
Habitat: in sandy soil
Conservation Status: Endangered