arrowleaf clover       
Trifolium vesiculosum             

Identifying Characteristics:

Seed:  oval shaped; size varies from 1.0 to 1.5 mm long and 0.7 to 0.9 mm wide; seed size is about half of an alfalfa seed; color varies from yellow to dark brown

Seedling:   glabrous leaves; arrow-shaped trifoliate leaflets without serrations; pronounced venation on leaves

Mature Plant:  white watermarks are generally found on leaflets; hollow and smooth stems that may be purple in color; erect growth habit; long, narrow stipules with white veins; conical flower head; flower color starts as white then turns to pink

Life Cycle: cool-season annual

Similar Species:   red clover – leaf shape and hairiness will help decipher arrowleaf and red clovers

References: Abaye, A. Ozzie. "Identification & Adaption: Common Grasses, Legumes & Non-leguminous Forbs of the Eastern United States."
Moore, Kenneth J. “Compendium of Common Forages.” From “Forages: An Introduction to Grassland Agriculture.”