Etymology: Berteroa: for Carlo Guiseppe Bertero, Piedmontese botanist
Plants: erect, annual to perennial, 10"-28" tall forb, stiff, usually with upper branches; stems leafy
Leaves: toothless
Flowers: white to yellow, 4-parted, 1/8" wide, petals deeply 2-lobed at the top; inflorescence a dense, rounded cluster; blooms May-Sept.
Fruits: fat, elliptical pods;
Habitat: disturbed sites, usually in sun on sandy soil
Conservation Status: Introduced - naturalized

Flora of North America: Flora of North America WIS DNR-Bureau of Endangered Resources: Detailed information on Wisconsin invasive species including decription, habitats, control methods USDA Plants Database: Federal Distribution and detailed information including photos Dan Tenaglia's The Missouri Flora: Fabulous photographs; detailed descriptions; color and leave arrangement key. USDA Agricultural Research Service (ARS): Images of seeds, fruits, embryos, etc.