Drawn from live specimen found in Maricopa County, Arizona.
The berries are eaten by birds and the leaves play host to a variety of insects and mites. The finger-shaped galls in the thumb-image below are caused by minute mites (arachnids) feeding and growing inside.
LEAVES: Compound leaves have three segments which have rounded lobes.
All the foliage will release pungent resinous terpenes on being crushed or
rubbed against. In autumn, like many sumacs, the deciduous leaves turn a
glorious orange-red. Few people get dermatitis from this plant.
Anacardiaceae -- Sumac Family
The Flora of Arizona's Sycamore Canyons