A stand composed of three or more age classes. A balanced uneven-aged stand consists of three or more age classes that are spaced at uniform intervals from reproduction to mature trees. Irregular uneven-aged stands do not contain all the age classes necessary to ensure that trees will reach maturity at short intervals indefinitely.

a stand of trees containing three or more age classes. In a balanced uneven-aged stand, each age class is represented by approximately equal areas, providing a balanced distribution of diameter classes.

A group of trees of a variety of ages and sizes growing on a uniform site; also called all-aged stand.

Three or more age classes of trees represented.

an area of forest composed of trees of similar species, in which trees of several age classes are represented. See all aged stand.

a group of trees of various ages and sizes growing together on a site.

a stand with trees of three or more distinct age classes, either intimately mixed or in small groups

a stand in which intermingling trees differ markedly in age. The differences in age found in an uneven-aged stand may be greater than 10­20 years and usually form more than three distinct age classes.