Trees, Shrubs and Woody Vines
Missouri has six species of ashes that you might find in natural settings. They have been very popular as shade trees, and their wood is famously useful. Ash trees of all the species in North America are currently being killed by the invasive, nonnative emerald ash borer.
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.