Trees, Shrubs and Woody Vines
Common prickly ash is a thicket-forming shrub or small tree. Its compound leaves resemble of those of ash trees, but it’s in a different family. Pairs of stout, curved prickles occur at each node. Scattered statewide, but less common in the Ozarks.
About Trees, Shrubs and Woody Vines in Missouri
There are no sharp dividing lines between trees, shrubs, and woody vines, or even between woody and nonwoody plants. “Wood” is a type of tissue made of cellulose and lignin that many plants develop as they mature — whether they are “woody” or not. Trees are woody plants over 13 feet tall with a single trunk. Shrubs are less than 13 feet tall, with multiple stems. Vines require support or else sprawl over the ground.