Field Guide

Water milfoils are feathery aquatic plants that grow rooted in shallow water. Their tips emerge above the waterline and bear bladelike, toothed leaves.

A tall, smooth, branching plant with red stems and juicy, dark purple berries, pokeweed is both toxic and a traditional edible potherb called poke salat. It is common statewide.

The flowers of dayflower are truly blue, and they have only two conspicuous petals. A fast-growing, sprawling, but shallow-rooted weed, this introduced species commonly annoys gardeners.

White crownbeard is a tall native perennial wildflower with clusters of white flowerheads. It's called “wingstem” for the narrow green wings running along the stem. It’s called “frostweed” because it forms "frost flowers": strange and beautiful formations at the stem bases after a sudden hard frost.

Compass plant grows to 8 feet tall and has foot-long, deeply cleft leaves at its base. It got its common name because its leaves turn so that the surfaces face east and west to take full advantage of the sun’s rays.

The bizarre, complicated flowers attract attention! The fruits are edible. Passion flower is a nonwoody vine that climbs via tendrils on trees or other structures. It is native to the southeastern United States, including southern Missouri.

The purplish or brownish disk florets of purple-headed sneezeweed set it apart from our other sneezeweeds, whose centers are yellow. Look for it in moist, open areas, mostly in the southern half of the state.

Climbing false buckwheat is a rampant, native, annual or perennial climber that often forms curtainlike masses of twining red stems, covering shrubs and trees. Look for it in moist, open or shaded bottomlands, alluvial valleys, and floodplains.

Shepherd’s purse is a plant that started in Europe and western Asia and has been introduced nearly worldwide. Like the common dandelion, it has several adaptations that make it a successful colonizer of disturbed soil.

Next time you breeze past weedy black mustard on the highway or spot it in a fallow field, think of how important this and other mustards are to the world economy – and to your dinner table.