Field Guide

Because each plant disperses a large number of seeds, garlic mustard can outcompete native vegetation for light, moisture, nutrients, soil, and space as it quickly colonizes an area.

Our most widely distributed early spring flower, spring beauty has 5 white or pink petals with distinct pink veining, and 5 pink anthers. The narrow, bladelike leaves are fleshy. These flowers often grow in abundance, covering a patch of ground with the beauty of spring.

Wild onion is edible and is also favored by native-plant gardeners, who enjoy its showy umbels of pink flowers and tolerance of dry, rocky sites. This Ozark species blooms in summer and fall.

Bull thistle is a weedy introduction from Europe, found statewide. To tell it from our other thistles, note its stems with spiny-margined wings, and its leaves with the upper surface strongly roughened with stiff, spiny bristles.

Solomon's seal grows statewide in moist, rich earth. The greenish-white flowers dangle like little bells beneath the leaves, under the gracefully arching stems.

Smooth spiderwort is the most common and widely distributed of Missouri's spiderworts. It has slender, straight or zigzag stems. The long, narrow leaves are folded lengthwise and attach to the stem in a thick node. The 3 petals of the triangular flower are blue, rose, purple, lavender, or white.

Square, unbranching stems, opposite leaves, two-lipped flowers, and a mild minty fragrance are clues Ohio horsemint is in the mint family. Tight, rounded flower clusters are stacked atop one another at the stem tips.

A square-stemmed plant with opposite leaves, self-heal bears two-lipped blue, lavender, or violet flowers in a cylindrical head. We have two varieties of self-heal in Missouri, one native and one introduced.

Also called horsemint and wild bergamot, Bradbury beebalm is a showy, fragrant plant that is a favorite of native plant gardeners. It’s also a favorite of Missouri’s butterflies!

Toothwort is a member of the mustard family that blooms March–May in wooded slopes and valleys. The sharply toothed, deeply lobed leaves are distinctive. The bright white, 4-petaled flowers shine at forest visitors.