Field Guide

Even without its flowers, or its fruits that resemble miniature oranges, common horse gentian is notable for its opposite leaves, which are broadly fused together at the bases and almost appear as a single leaf with a stem going through it.

One of our more challenging plants to identify, meadow parsnip looks an awful lot like golden Alexanders. But you can do it! Look closely at the flower clusters and at the edges of the leaves, and then check the seeds.

Causasian bluestem and the closely related yellow bluestem are both aggressive, weedy degraders of pasturelands that escape cultivation and endanger native habitats. Learn more about these Old World grasses, and please don’t plant them!

Johnson grass is a native of the Mediterranean that is invasive in our country. It’s a weed that infests cropland and degrades native ecosystems, and heavy infestations are found in all the major river bottoms of Missouri.

Yellow bluestem is a nonnative, aggressive, weedy degrader of pasturelands that escapes cultivation and endangers native habitats. It blooms in Missouri in late June to July, far earlier than our native bluestems.

The brown, starlike, spreading flowers of climbing milkweed differ from those of other milkweeds, but milky sap, warty pods with silk-tasseled seeds, and the structures in the center of the flowers show its true alliance.

Black-eyed Susan is a tremendously popular native wildflower for gardening. It’s also commonly planted along roadways, so when it’s blooming, May through October, you’re sure to see it somewhere.

Missouri has more than 200 species in the sedge family. Distinguishing between these grasslike plants can be difficult, but it’s easy to learn some basics about the group.