Common Name
Buffalo bur, Kansas thistle, duraznillo
Botanic Name
Solanum rostratum Dunal
Plant Family
Common in waste areas, roadsides, barnyards and fields.
Animals Affected
Cattle, sheep, horses.
Buffalo-bur - Solanum rostratum
Toxic Principle
Solanine: an atropine-like alkaloid that acts on the autonomic nervous is present in all parts of the plants. The plant however, is rarely eaten because of its extensive protective spines. More problems are associated with the trauma from the spiny burs.
Annual weeds growing 1-2 feet in height, with showy yellow flowers with 5 partially united petals. The leaves and stems have prominent long yellow spines. Leaves are alternate and deeply lobed. The berry is completely enclosed in a calyx covered in yellow spines.
Bloating, colic and diarrhea may result from eating the young green plants.
Animals usually recover if they are removed from the plants, and treated symptomatically.
Special Notes
Buffalo burs are prolific seed producers and should be mowed or treated with herbicides before they reach fruiting stage.
Distinctive spiny burrs