Phryma leptostachya, or lopseed, is a perennial herb of the genus Phryma. When distinguished from Phryma oblongifolia and Phryma nana, it is native to eastern North America.
The plant stands about 0.3 to 1.0 meters tall, and the inflorescences bear a number of small (4 mm) tube-shaped white to pink flowers.
Orobanchaceae, the broomrapes, is a family of mostly parasitic plants of the order Lamiales, with about 90 genera and more than 2000 species. Many of these genera (e.g., Pedicularis, Rhinanthus, Striga) were formerly included in the family Scrophulariaceae sensu lato. With its new circumscription, Orobanchaceae forms a distinct, monophyletic family. From a phylogenetic perspective, it is defined as the largest crown clade containing Orobanche major and relatives, but neither Paulownia tomentosa nor Phryma leptostachya nor Mazus japonicus.
The Orobanchaceae are annual herbs or perennial herbs or shrubs, and most (all except Lindenbergia, Rehmannia and Triaenophora) are parasitic on the roots of other plants—either holoparasitic or hemiparasitic (fully or partly parasitic). The holoparasitic species lack chlorophyll and therefore cannot perform photosynthesis.