Field Guide

Of the many invasive nonnative plants that were originally introduced to stop soil erosion and improve soils, kudzu is one of the worst. This “vine that ate the South” is often the first plant that comes to mind when we think of “invasive plants.”

Water smartweed can live submerged in water, or on wet banks or other soggy ground, yet it can also live in merely moist areas. The stems often sprawl as they grow, taking root at the swollen nodes. The small, pink flowers develop in long, erect clusters.

Instantly recognizable as a type of morning glory, hedge bindweed is common in disturbed habitats and can be a serious agricultural weed, but it is not as problematic as its relative field bindweed.

Butterfly pea is a low, shrubby, or twining perennial in the pea family, with showy, butterfly-like flowers. The leaves are compound with three leaflets. This species grows in the southern parts of Missouri, in acid soils.

Everlasting pea is an old-fashioned garden plant your grandma might have grown on a fence. Native to the Old World, it often persists at old homesites.

Bees, butterflies, and other insects love its nectar, but sand vine is also a problem weed that can be difficult to eradicate. Some people cultivate it as an ornamental. Beekeepers value it as an excellent honey plant.

In summer, you’re almost guaranteed to see big colonies of crown vetch along Missouri's highways. This weedy nonnative plant stabilizes the dirt after road construction but degrades our natural ecosystems.

Milkweeds are a group of plants that used to have their very own family. Now part of the dogbane family, they’re still a pretty distinctive group.