the height on the tree bole representing the bottom of the live crown, defined variously as (a) the lowest live branch; (b) the lowest whorl with live branches in at least three of four quadrants around the stem; (c) in a crown visually reconstructed to have a symmetric base, the point of attachment of the lowest live branch; (d) the lowest whorl with live branches around at least 0.75 of the stem circumference; (e) in hardwoods, the lowest live foliage —see crown heightThis definition last updated 07/29/2008