Structural Features 
Growth rings vary from distinct to indistinct in albarco (3, 10). 
The pores or vessels are readily seen and may contain tyloses. 
Crystal chains occur in the wood parenchyma. The tangential bands of 
parenchyma cells, as seen on a smooth end-grain surface, form numerous closely 
spaced, concentric lines that aid in distinguishing albarco from mahogany 
(3, 7, 10). 
Rept. No. R1921 -h- 
