Quick definitions from WordNet (buffalo clover)
▸ noun: clover of western United States
▸ noun: 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
▸ noun: clover of western United States
▸ noun: 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