Species Information

• Austrian peaweed (alkali swainsonpea)
• Sphaerophysa salsula (Pallas) DC.
• USDA Symbol: SPSA3
• Oregon Noxious Weed Designation: B
• Pictures

Identification: Perennial; flowers from May to July. A creeping plant with compound leaves; numerous leaflets oval and covered in hair. Flowers 1/4 to 1 inch long and orange-red. Many seeds in bladder-like translucent pods.

Impacts: This plant was introduced from Asia and is commonly found in western states in irrigated fields as well as moist soil in waste places along roadsides and fences. It is a potential threat to grain and alfalfa growing areas. The seed is a contaminant in alfalfa seed production; it is the same size, shape and weight, making it impossible to separate.

Biological Controls: No approved biological control agent is available.

Oregon Maps of Austrian Peaweed Distribution

Links:

USDA Plants Database information on Austrian peaweed

GRIN Database information on Austrian peaweed

Oregon Department of Agriculture information on Austrian peaweed