Invasive Giant Knotweed
Shrub-like herbaceous perennial that is a member of the Buckwheat (Polygonaceae) family. It hybridizes with Japanese knotweed and silver lace vine (P. baldschuanicum).
Japanese Hedgeparsley
An herbaceous, annual that is a member of the Carrot (Apiaceae) family.
Japanese Knotweed
Perennial, herbaceous shrub that is a member of the Buckwheat (Polygonaceae) family. It can form dense thickets that shade out natives and rhizomes can damage pavement. Prohibited under Michigan law.
Leafy Spurge
Herbaceous perennial that is a member of the Spurge (Euphorbiaceae ) family. It ranges in height from 15-92 cm (6-36 in) tall and has a root system that can extend up to 6 m (~20 ft). This species is listed under Regulation No. 715 - Seed Law Implementation as a prohibited noxious weed by the Michigan Department of Agriculture.
Lesser Celandine
Herbaceous, ephemeral perennial that is a member of the Buttercup (Ranunculaceae) family. It grows from tuberous roots and may form a continuous carpet. Emerges well before native ephemerals.
Spotted Knapweed
Short-lived herbaceous biennial or perennial that is a member of the Aster (Asteraceae) family.
Wild Parsnip
Tall, herbaceous biennial that dies after producing seed and is a member of the Carrot (Apiaceae) family. Chemicals found in leaves, stems, and flowers of wild parsnip can cause skin rashes, burns, and blisters, especially in the presence of sunlight.