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Buffalobur (Solanum rostratum)
ODA rating: B
Other common names: Kansas thistle, Texas thistle, and Colorado bur
Description
Annual; flowers midsummer to September. Grows up to two feet high. The stems, leaves, and even flowers sport many sharp spines. Leaves are deeply lobed and grow up to 5 inches long. Yellow flowers are one inch across with five petals. A dry berry covered with sharp spines contains numerous black, wrinkled and flattened seeds.
Impacts
Buffalobur is a native of the Great Plains and is drought tolerant. It can be found in meadows, dry rangeland, pastures, lawns, cultivated fields, roadsides, and waste areas. It is not very competitive and survives in disturbed, dry areas. It can grow in a wide variety of environmental conditions and serves as a host for the Colorado potato beetle. The burs may cause damage and considerable loss in wool and fiber value for sheep and goats.
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Introduction
Buffalobur is a native North American species that's range extends from central Mexico northward across the Great Plains. The name "buffalobur" dates back to the settlement of the Great Plains when the plant grew abundantly in the disturbed soil of bufallo wallows. It is thought buffalo carried the burs great distances in their shaggy coats.
Distribution in Oregon:
Map legend
Yellow: limited distribution
Red: abundant
Grey: not known to be present
Biological controls
No approved biological control agents are available.
Informational Links
WeedMapper
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