Swainsonpea

Description:

SWAINSONPEA - Sphaerophysa salsula (Pall.) DC.

Fabaceae - (Pea family)

Swainsonpea is a creeping perennial reproducing by seeds and lateral roots. Leaves are compound, composed of numerous opposite leaflets which are oval and covered with hair. Flowers occur from May to July, are 1/4 to 1 inch in length and are orange-red. Many seeds are formed in bladder-like translucent pods. Seeds are green with an attachment indentation.

This plant was introduced from Asia and is commonly found in some western states along roadsides and fences. It is a potential threat to alfalfa seed producing areas; the seed is a contaminant in alfalfa seed which is the same size, shape and weight, making it impossible to separate.

(Courtesy of Weeds of the West)