Trefoil, the Common Bird's-Foot, or Lotus corniculatus, L. an indigenous perennial, growing in meadows, pastures, heaths, and road-sides, where it flowers from June to August. - This plant is eaten by cows, goats, and horses; but, according to Linnaeus, is not relished by swine or sheep; though it is propagated in Hertfordshire as pasturage for the latter animals. - Dr. Anderson strongly recommends it to be cultivated for cattle; and Mr. Woodward remarks, that it may be raised to great advantage; as it attains a considerable height in moist meadows, and makes good hay. - Its flowers, when dried, acquire a greenish cast; in which respect, they resemble those of the plants producing Indigo : it is, therefore, probable, that they may be advantageously employed for obtaining a substitute for that expensive dyeing material.

According to Bradley, an infusion of the seeds, flowers, and leaves of the Common Bird's-foot, to wine, operates as a diuretic; and at the same time tends to allay the irritation of the urinary canal.