Cherry
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CHERRY. Citrus limon, Lemon.
In front of the post office.
A pair of leaves that descend from a shared node, when no other leaves are descended from that node, is known as a cherry. The shared ancestral node is termed a cherry node.
The term arises from the phenomenon in cherry trees in which there are nodes from which two fruits, and only those two fruits, descend. In this case, the cherry consists of two lemons.
Photo: Noah Rosenberg, January 5, 2022