Priapus, the son of Dionysus and Aphrodite, was regarded as the god of fruitfulness, the protector of flocks, sheep, goats, bees, the fruit of the vine, and all garden produce.
His statues, which were set up in gardens and vineyards, acted not only as objects of worship, but also as scarecrows, the appearance of this god being especially repulsive and unsightly. These statues were formed of wood or stone, and from the hips downwards were merely rude columns. They represent him as having a red and very ugly face; he bears in his hand a pruning knife, and his head is crowned with a wreath of vine and laurel.
He usually carries fruit in his garments or a cornucopia in his hand, always, however, retaining his singularly revolting aspect. It is said that Hera, wishing to punish Aphrodite, sent her this misshapen and unsightly son, and that when he was born, his mother was so horrified at the sight of him, that she ordered him to be exposed on the mountains, where he was found by some shepherds, who, taking pity on him, saved his life.
This divinity was chiefly worshipped at Lampsacus, his birthplace. Asses were sacrificed to him, and he received the first-fruits of the fields and gardens, with a libation of milk and honey. The worship of Priapus was introduced into Rome at the same time as that of Aphrodite, and was identified with a native Italian divinity named Mutunus.
From: Berens, E.M. The Myths and Legends of Ancient Greece and Rome. New York: Maynard, Merril, & Co., 1880. Text in the public domain.