Populus tremuloides, Quaking Aspen Cross-Section
                This is an image from a stained standard section of Populus
                  tremuloides made by John P. Limbach of Ripon, Wisconsin.
                
              
              
                Transmitted Off Circular Polarized Light Illumination
                
Definition/Function:
                KINGDOM: Plantae UNRANKED: Angiosperms UNRANKED: Eudicots UNRANKED: Rosids ORDER:
                Malpighiales FAMILY: Salicaceae GENUS: Populus
                SECTION: Populus SPECIES: tremuloides
                Significance in the Environment:
                Characteristic Features:
                Associated Particles:
                References:
                Core, H.R., W.A. Cote, and A.C. Day, WOOD STRUCTURE AND IDENTIFICATION, Syracuse Wood
                Science Series, Vol. 6, 1979. 
                http://en.wikipedia.org/wiki/Populus_balsamifera