This familiar species is found commonly throughout the Northern States and Canada, from May to September. It is a perennial, naturalized from Europe. The finely ribbed and branching stalk grows two or three feet high from fibrous roots. It is erect, and generally hairy, hollow and stout. The conspicuous flower is an inch broad, with five rather wide and rounding bright yellow petals. The inner surface is exceedingly glossy, like enamel, while the outer is dull and paler in colour. The numerous yellow stamens are grouped delightfully around the many small green pistils, forming the centre. Five narrow, pointed sepals open widely and are slightly curved and hairy, and pale yellow in colour. The flowers expand considerably after the small, round, green buds open, and when fully matured some of them possess a delicate, though scarcely perceptible fragrance. The basal leaves have long, narrow, grooved stems, and form pretty, rounded and slightly spreading tufts near the ground. They are divided from three to seven times, and each division is again cleft into numerous narrow parts, and sharply pointed lobes. The veins show plainly, and the surface is downy and soft to the touch. Their dark green colour becomes lighter on the under side. The fewer upper leaves are simply three-parted, and clasp the stalk where it branches. It is common practice afield to pluck a flower and carry it in the mouth; but with the Buttercups this should be avoided, as its acrid juice causes blisters to appear on the lips and tongue. For this reason it is known in some localities as the Blister Flower. The generic name is derived from the Latin, rana, a small frog, and was applied by Pliny because some of the Crowfoots grew where the frogs abound.