Dalea candida var. oligophylla (Torr.) Shinners
Family: Fabaceae
slender white prairie-clover, white prairie-clover
[Dalea oligophylla (Torr.) Shinners,  more...]
Dalea candida var. oligophylla image
from USDA Plants website  
Etymology: Dalea: named after Samuel Dale (1659-1739), an English physician, botanist and botanical collector, and gardener who was the author of several botanical works and a treatise on medicinal plants. He was an associate of several major botanical figures in England,
Plants: perennial forb
Conservation Status: Introduced - adventive