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The Mission of the Yellowstone County Weed Department is to assist the public, private, and other government agencies to manage and control existing noxious weed infestations as well as to prevent new invasive species from infesting Yellowstone County.
Perennial PepperweedLepidium latifolium
Photo from Weeds of the West, revised edition.
Photos from Montana Weed Control Association
Video Supplied By Montana Weed Control Association
| Attribute | Description |
|---|---|
| Growth Habit | Perennial, 1 to 3 feet in height. |
| Leaves | Leaves are lanceolate, bright green to gray-green, entire toothed; basal leaves larger than upper leaves; inflorescence a raceme. |
| Stem | 1 to 3 feet in height. |
| Flower | Flowers are white, in dense clusters near ends of branches, very small. |
| Roots | Deep-seated rootstocks and creeping rhizomes, very difficult to control. |
| Seeds | 2 seeds per fruit; fruit is a silicle, rounded, flattened, slightly hairy, about 1/16 inch long, and reddish-brown. |
| Reproduction | By seed and creeping rhizomes. |
| Habitat | Grows in waste areas, wet areas, ditches, roadsides, and cropland. |
| Biological control | — |
| Herbicides | 2,4-D amine, Escort, Telar. |