the Pine-tree. See BOTANY, and PLANTING.

PIOMBINO, a seaport-town of Tuscany, in the province of Pisa, stands on the channel of the same name, 69 miles S.S.W. of Florence. It is surrounded by walls, and has a citadel, three forts, a fine church, a palace, and a small harbour. In the vicinity there are salt-works, and some remains of the ancient town of Populonia. Some trade is carried on here. Piombino was at one time the capital of an independent principality, which included the island of Elba. Pop. 4000.