Field Guide

Wildflowers, Grasses and Other Nonwoody Plants

Showing 311 - 319 of 319 results
Photo of yellow rocket flower clusters
Yellow Rocket
Barbarea vulgaris
Yellow rocket is a mustard native to Eurasia that was introduced long ago and today is found across North America. The mustard family used to be called the Cruciferae, because of the cross shape formed by the four petals.
Photo of black mustard flower cluster
Black Mustard
Brassica nigra
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.
Vertical image closeup of sweet flag spadix
Sweet Flag (Calamus)
Acorus calamus (syn. A. calamus var. calamus)
At a glance, the upright sword-shaped leaves of sweet flag make it resemble cattails. Like them, sweet flag lives in wet soils. But the flower heads are distinctive, and details of the leaves set them apart, too.
Butterweed blooming at Mokane Access, April 26, 2020
Butterweed
Packera glabella (formerly Senecio glabellus)
Butterweed, one of Missouri’s seven species of ragworts or groundsels, is the only one that is an annual. It grows in colonies, at times covering acres of floodplain. Stems are heavily ridged and usually inflated or hollow. It blooms April–June.
Common periwinkle, or Vinca minor, flowers and leaves
Common Periwinkle
Vinca minor
Common periwinkle is a low-growing, mat-forming, purple-flowering perennial that is woody at the base. Native to Eurasia, it is often grown as a groundcover. It has proven invasive in much of the eastern United States and frequently escapes from cultivation. Planting it is not recommended.
Whorled milkweed flowers.
Milkweeds
Subfamily Asclepiadoideae
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.
Photo of copper iris plants with flowers
Copper Iris
Iris fulva
This attractive, copper-colored iris is gaining in popularity as a garden plant even though its numbers are declining in the wild. Like many other native plants, copper iris is hardy, low-maintenance, and has few pest or disease problems.
Photo of tall fescue plants
Tall Fescue
Festuca arundinacea
You’ve seen it a million times, now learn to identify it! Technically an exotic invasive plant, tall fescue is practically everywhere, from lawns to levees, and from pastures to (unfortunately!) prairies.
Photo of wild bergamot or horsemint plant with lavender flowers
Wild Bergamot
Monarda fistulosa
Sometimes called beebalm, wild bergamot (or horsemint) is a native mint with a long history as a valued Missouri herb. Some people make tea from it, but most of us enjoy its large, colorful flowers.
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About Wildflowers, Grasses and Other Nonwoody Plants in Missouri

A very simple way of thinking about the green world is to divide the vascular plants into two groups: woody and nonwoody (or herbaceous). But this is an artificial division; many plant families include some species that are woody and some that are not. The diversity of nonwoody vascular plants is staggering! Think of all the ferns, grasses, sedges, lilies, peas, sunflowers, nightshades, milkweeds, mustards, mints, and mallows — weeds and wildflowers — and many more!