Princeton's WordNet

1. staghorn sumac, velvet sumac, Virginian sumac, vinegar tree, Rhus typhina(noun)

   deciduous shrubby tree or eastern North America with compound leaves that turn brilliant red in fall and dense panicles of greenish yellow flowers followed by crimson acidic berries

2. smooth sumac, scarlet sumac, vinegar tree, Rhus glabra(noun)

   common nonpoisonous shrub of eastern North America with waxy compound leaves and green paniculate flowers followed by red berries