Synonyms for Buffalo Clover (same or very similar meaning)
WordNet sense 1 (low-growing annual herb of southwestern United States (Texas) having silky foliage and blue flowers; a leading cause of livestock poisoning in the southwestern United States):
bluebonnet, Texas bluebonnet, Lupinus subcarnosusWordNet sense 2 (clover of western United States):
Trifolium reflexum, Trifolium stoloniferumFrom the ODE community, based on WordNetadd/edit