Solanum rostratum


Buffalobur - An annual plant growing around 1.5-3 feet tall, covered in spines and hairs.

Leaves: Alternate leaves 2-6 inches long. Leaves are irregularly cut into 5-7 lobes and are very prickly.

Flowers: Flowers bloom from June-September. 3-15 flowers per flower cluster. Flowers are bright yellow, 5 lobed, flat, and circular shaped about an inch across.

Habitat: Found in fields, overgrazed pastures, yards, road sides, waste areas, barn yards, it can grow in sandy soil, dry soil, and rich moist soil.

Weed Classification: C

Why is it a Noxious Weed?

Buffalobur is toxic to livestock, and spreads easily in pastures and fields outcompeting desired grazing forage.

Buffalobur can be hard to control. If you have buffalobur and need help with identification or control please let us know.

Control Recommendations:

WA State Noxious Weed Control Board

PNW Pest Management Handbook

King County Control Options