Sepals, not turned back. Petals, longer than the sepals, not so deep a yellow as the last. Flowers, large and showy. Leaves, from the root, 3-divided, the divisions 3-cleft, sessile, all deeply toothed. Lower leaves tufted at the root, on long, hairy petioles; upper scattered on the stem, with short petioles or none, 3-parted. Stem, rough, hairy, 2 or 3 feet high. May to September.
Common in Canada and the Eastern States. The stem and leaves contain a peculiarly acrid juice. If they are bitten into, the tongue and lips will be blistered in a painful manner. Beggars use the juice to produce sores upon their skin. Children picking them with moist hands will be troubled with an irritating eruption. Cattle refuse to eat them, hence they flourish in great numbers. When dried in hay the acrid properties disappear. An undesirable importation from Europe. In England buttercups are called kingcups, goldcups, butter-flowers, and blister-flowers.