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Content tagged with "invasive species"

This booklet shows you how to identify and control bush honeysuckles, and then use Missouri native shrubs to provide high-quality habitat.

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Photo of cut-leaved teasel showing flowerhead and joined, cuplike leaves.

Cut-Leaved Teasel

Cut-leaved teasel is more aggressive than common teasel. Note its flowerheads with white flowers, and the cuplike structure created by the opposite leaves as they fuse around the stem.

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Photo of cut-leaved teasel plants showing white flowering heads.

Cut-Leaved Teasel

Currently, invasive teasels in our state occur mainly along highways, but these aggressive weeds can outcompete native plants, especially in prairies and savannas. Their spines protect them from being eaten by most herbivores, so it’s up to humans to check their spread.

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Photo of cut-leaved teasel, blooming flowerhead, showing white flowers.

Cut-Leaved Teasel (Flowerheads)

Cut-leaved teasel typically has white flowers. It was first recorded in our state in 1968, when it apparently had sprouted from seeds spread from a cemetery wreath to a nearby fencerow. But there have undoubtedly been numerous introductions since then. It is robust, aggressive, and is spreading rapidly along highways and other open habitats.

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Photo of cut-leaved teasel showing deeply pinnately lobed leaves.

Cut-Leaved Teasel (Leaves)

The deeply cut, pinnately lobed stem leaves explain the name of cut-leaved teasel.

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Deer tracks showing both hoof and dewclaws

Deer Tracks

Compared to rounded hog tracks, deer tracks are more elongated from tip to heel. If deer dewclaws show in the track, they typically do not register wider than the hoof.

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Photo of man holding a wad of didymo

Didymo

Didymosphenia geminata, an invasive algae, forms slimy mats that smother fish eggs and makes water sports unpleasant.

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photo of didymo

Didymo

“Didymo” or “rock snot” is an invasive alga that forms large, thick mats on the bottom of lakes and streams, smothering aquatic life vital to the food chain that supports many fish species, including trout.

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Didymo Control

pdf (528.5 K)
This fact sheet shows you how to identify and control didymo, a type of invasive algae commonly known as "rock snot." which can cover stream bottoms, smothering fish eggs, degrading water quality and affecting fishing success.

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Ditch the Invasive Hitchhikers

Camping and boating travelers beware!

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