Field Guide

Three species of yucca grow wild in Missouri. Spanish bayonet was introduced from the Southwest and has escaped from cultivation, but our two soapweeds are native.

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.

Missouri has 276 species in the grass family, including well-known crop plants and our native prairie grasses. Distinguishing between the species can be difficult, but it’s easy to learn some basics about the group.

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.

Whorled milkweed has rounded clusters of small white flowers. The leaves are soft, threadlike, and grow in whorls from the stem. It occurs in upland prairies and fields.

Prairie milkweed’s full, rounded clusters of small, delicately purple-tinged flowers set it apart from other prairie milkweeds.

Missouri has 24 species in the rush family. Distinguishing between these grasslike plants can be tricky, but it’s easy to learn some basics about the group.

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.