Solanum rostratum Dunal
Family: Solanaceae
buffalo-bur, buffalo-bur nightshade
Solanum rostratum image
Kitty Kohout  
Solanum rostratum image
Kitty Kohout  
Solanum rostratum image
University of Wisconsin-Stevens Point, Robert W. Freckmann Herbarium (UWSP)  
Etymology: Solanum: Latin for "quieting," in reference to the narcotic properties of some species
Plants: erect, annual, 12"-40" tall forb, coarse, branched; stems very prickly
Leaves: leaves with yellow spines, larger leaves deeply pinnately-lobed
Flowers: yellow, 5-parted, 1" wide, saucer-shaped; inflorescence a short-stalked cluster (raceme) of 3-15 stalked flowers that becomes up to 6" long with age
Fruits: berry with a very prickly covering
Habitat: dry; prairies
Hazardous: Careful, this plant is hazardous!
Conservation Status: Introduced - naturalized

Buffalo-bur. Roadsides, railroads, fallow fields, cornfields, pastures, stream banks, barnyards, dumps, and other open, waste ground (e.g., ballast, mine tailings, building sites); a weed in yards and gardens, rarely in sand prairies and on dunes. A native of the Great Plains and Mexico, now spread throughout the U.S., across Canada, and widely introduced elsewhere. First collected in 1894 in Dane Co.

This species is the original native host of the Colorado potato beetle, which by the 1850s had adopted the potato as a new host.

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Kitty Kohout  
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Janice Stiefel  
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Merel R. Black  
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Robert R. Kowal  
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Merel R. Black  
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Kitty Kohout  
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