Buffalobur (Solanum rostratum)

BuffaloburBACKGROUND: Buffalobur is native to the Great Plains region of the U.S. It is a drought-tolerant species that can grow in a wide variety of environmental conditions. Buffalobur spreads exclusively by seeds, which are enclosed within the spiny lobed caylx.

BuffaloburDESCRIPTION: Buffalobur is an annual, with spiny leaves, flowers, and stems, that grows up to 2 feet tall. Leaves are deeply lobed like a watermelon leaf, and up to 5 inches long. Flowers are 1 inch across, 5 petalled, bright yellow, and bloom from midsummer until frost. One of the anthers in each flower is longer than the other four. The fruit is a dry berry that is overgrown by the calyx, forming a burlike fruit. Seeds are black, flat, and wrinkled.

DISTRIBUTION: Buffalobur is widely scattered throughout the West and has been seen in selected Idaho counties that are shown below.

CONTROL: No biological control agents are available for Buffalobur, but herbicides are available that can provide excellent control of this weed.

 Buffalobur Distibution Map - Grey Area


© 1999 University of Idaho: Text and photographs for these pages from Idaho’s Noxious Weeds, by Robert H. Callihan and Timothy W. Miller (revised by Don W. Morishita and Larry W. Lass).

Please contact: Ag Publishing, University of Idaho, Moscow, Idaho 83844-2240; (208) 882-7982; [email protected]; or visit the UI Extension/CALS Publications and Multimedia Catalog website at www.cals.uidaho.edu/edComm/catalog.asp, for more information about this or other publications.