Worlds of David Darling
Encyclopedia of Science
Home > Encyclopedia of Science


The pith is the central strand of parenchymatous tissue (see parenchyma) that occurs in the stem or root of most vascular plants. It is usually surrounded by vascular tissue and is believed to function chiefly for storage. The term is also used for the soft core at the center of the heartwood of logs, consisting of the dried remains of the pith.

Related category