Smearwort (Aristolochia rotunda), also known as Round-leaved Birthwort, English Mercury, Mercury Goosefoot, Allgood, Tola Bona or (ambiguously) "Fat Hen",'s a perennial herb. Uses Medicinal uses The name Smearwort's derived from its use as ointment. Poultices derived from the leaves were used to heal chronic sores. Roots were often used on sheep to remedy cough. Shagreen uses And, the seeds have found employment in the making of shagreen. Food uses Smearwort leaves can be gathered when young… (More on Smearwort)