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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.
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© Wisconsin State Herbarium, UW-Madison
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