BONESET (Eupatorium per foliatum), a North American plant of the family Compositae. It is also called thoroughwort, ague-weed and Indian sage, com mon in wet places from Nova Scotia to Manitoba and south ward to Florida and Texas. It is a coarse, rough, hairy perennial, 2 ft. to 6 ft. high, with lance shaped, taper-pointed, toothed, wrinkled, very veiny leaves, 4 in. to 8 in. long, which are joined to gether at their bases around the stem. In August the plants bear small, tubular, white flowers in numerous heads which are ar ranged in a flattish much branched cluster 4 in. to 7 in. wide. Boneset was formerly in high repute for its medicinal properties and is still used in household medicine by many persons. (See EUPATORIUM.)