by Mary Free and Christa Watters, Extension Master Gardeners

What are the spots, raised bumps, or stripy scarifications often visible on the stems of trees like pawpaw, birch, and cherry?
The name of these pores is derived from the Latin word, lenticula, meaning “little lens.” Click here if it is still a mystery or to learn what three foods commonly sold in grocery stores also display these pores.

Photo © Mary Free

Photo © Mary Free

Photo © Elaine Mills

