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Content tagged with "nuisance plant"

Photo of Johnson grass, big clump next to a field

Johnson Grass

Johnson grass is a tall, coarse, perennial grass with stout rhizomes. It grows in dense clumps or nearly solid stands in crop fields, pastures, abandoned fields, rights-of-way, and forest edges and along stream banks.

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Photo of Johnson grass panicles against a blue sky

Johnson Grass

Johnson grass is native to the Mediterranean and now occurs in warm-temperate regions worldwide. It is common in the southern United States. Heavy infestations in river bottoms can reduce corn or soybean yields in Missouri to a few bushels per acre. More than 300,000 acres are infested in the Missouri Bootheel alone.

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Photo of Johnson grass flower clusters

Johnson Grass (Flower Clusters)

The flower clusters (panicles) of Johnson grass are large, loosely branched, purplish, and hairy. The spikelets (the small flowering units) occur in pairs or threes, and each has a conspicuous awn. It blooms June through November.

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Photo of Johnson grass infesting a crop field

Johnson Grass Infesting A Crop Field

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.

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Use this print-and-carry sheet to identify and control invasive kudzu in Missouri.

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Photo of leafy spurge seed heads

Leafy Spurge

Euphorbia esula
When you consider the negative effects this plant has on natural habitats, and how hard it is to control or eradicate, you almost want to rename it “leafy scourge”! This invasive plant is spreading in our state. Learn how to identify it.

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Photo of leafy spurge seed heads

Leafy Spurge (Seed Heads)

Leafy spurge is an invasive plant that is spreading in our state. Leaves are usually alternate, but those immediately beneath the flowers are whorled. Leaves on the lower half of the stem are scalelike, while those on the upper parts are linear to oblong. All parts of the plant bleed a milky sap that causes skin irritation. Flowers are borne in umbels and appear greenish yellow.

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Use this print-and-carry sheet to identify and control Leafy spurge on your Missouri property.

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Missouri's Most Irritating Plant

This content is archived
For instigating itches, rashes and discomfort, few plants can compete with poison ivy.

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Download this article to learn more about poison ivy.

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