By The Old House Web
Heartwood is a collection of dead xylem vessels making up most of what is classified as a trees or shrub's wood. While the xylem are classified as dead, they still may store some carbohydrates.

Because the center of the plant is composed of essentially dead cells, hollow trees can live for years with little problems.

See: Hollow trees

Articles in this collection were copyrighted 1995 by the Board of Trustees of the University of Illinois. For full copyright information about the articles in this encyclopedia, click here.

Search Improvement Project