BUFFALO BUR

also called Beaked Nightshade, or Prickly Potato (Solanum rostratum), plant of the nightshade family Solanaceae (order Solanales), native to high plains east of the Rocky Mountains from North Dakota to Mexico. It bears small yellow flowers from May to September. The buffalo bur, named for its prickly covering enclosing the berry, is the original host plant of the destructive Colorado potato beetle. It is now an aggressive weed in many places.