English: Moth combseed; Round-nut pectocarya.
Genus: 12 species.
Region: western North America, Baja California, Sonora and Mojave Desert, Pacific United States.
Habitat: desert scrub, woodland, and grassland.
BotanyHerb; annual.
Stem: slender; rough-haired stem; upright to erect; up to 23 centimeters.
Leaves: small, pointed, linear; alternate along the upper stem, opposite along the lower part.
Inflorescence is a series of flowers, each on a curved pedicel.
Flowers: small green sepals, lined with hairs and long bristles.
Fruits: rounded or oval nutlets; with membranous wings along the sides.