Field Guide

Wildflowers, Grasses and Other Nonwoody Plants

Showing 1 - 10 of 124 results
Photo of Japanese stiltgrass
Japanese Stiltgrass (Eulalia)
Microstegium vimineum
Japanese stiltgrass is an invasive annual grass with thin, pale green, lance-shaped leaves that are 3 inches long. It has spread to nearly every eastern U.S. state. It forms dense patches, displacing and outcompeting native species for nutrients and light.
Photo of common scouring rush, many stems in a colony
Horsetails (Scouring Rushes)
Equisetum (3 spp. in Missouri)
Horsetails, or scouring rushes, are in the genus Equisetum. They’re easy to recognize with their jointed, hollow stems. Like ferns, they reproduce via spores instead of flowers and seeds.
Photo of an Engelmann’s adder’s tongue with a black background
Adder's Tongues
Ophioglossum spp.
Four species of adder’s tongue ferns occur in Missouri. They don’t look like typical ferns. They have spoon-shaped leaves and an upright spore-bearing stalk.
Western ironweed flowerhead in bloom
Western Ironweed (Baldwin's Ironweed)
Vernonia baldwinii
Ironweeds are tough, grayish-green, branching plants known for their fluffy-looking clusters of reddish-purple florets. They are a familiar sight on roadsides and pastures. Identify western ironweed by the bracts at the base of the flowerheads.
Photo of mullein basal leaves
Mullein
Verbascum thapsus
Mullein immigrated to America along with Europeans, and with them it has spread across the continent. Its fuzzy, green-gray rosettes of leaves and tall spikes of yellow flowers make it easy to identify.
Photo of white anemone
White Anemone (Windflower)
Anemone canadensis
White anemone is a showy native wildflower with interesting, deeply toothed leaves. Often occurring in colonies, it spreads easily (even aggressively) from rhizomes and is sometimes cultivated in wildflower gardens.
Photo of white snakeroot leaves and flowers
White Snakeroot
Ageratina altissima (formerly Eupatorium rugosum)
White snakeroot looks very similar to thoroughworts, but it has triangular leaf blades that are more broadly angled or rounded at the base. White snakeroot is common statewide. It’s a toxic plant if eaten, so it’s good to be able to identify it.
American, or common boneset, flower clusters and upper stem leaves
American Boneset (Common Boneset)
Eupatorium perfoliatum
American, or common boneset has small, white flowerheads in flat-topped clusters at the top of the plant. The leaves are hairy, narrowly triangular, and in opposite pairs fused around the stem.
Photo of a tall thoroughwort plant in bloom.
Tall Thoroughwort (Tall Boneset)
Eupatorium altissimum
A stout perennial that can grow to 6 feet tall, tall thoroughwort is a member of the sunflower family that has dull white flowers and distinctive leaves that are opposite, slender, very short-stalked, and with three quite noticeable veins.
Photo of mist flower or wild ageratum plants with flowers
Mist Flower (Wild Ageratum; Blue Boneset)
Conoclinium coelestinum (formerly Eupatorium coelestinum)
Mist flower, or wild ageratum, is a vigorous native perennial bearing fluffy-looking, bluish-purple flowerheads. It looks quite a bit like the annual ageratum that is sold as a bedding plant in garden centers.
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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!