|
Species
Information
- hairy
whitetop
- Lepidium pubescens (auct. non Desv.) = Cardaria
pubescens (C.A. Mey.) Jarmolenko = Lepidium appelianum (Al-Shehbaz)
- USDA
Symbol: CAPU6
- Oregon
Noxious Weed Designation: B
- Pictures
Identification:
Perennial, blooms April-October. Grows up to 2 ft tall. Leaves 3 inches long and 1 inch wide, often smaller. Hairs sparse. Petals white, mostly 2-3.5 mm long. Pods strongly inflated, spherical to ovoid, and covered with short hairs. Hairy whitetop is difficult to distinguish from hoary cress in the vegetative state.
Impacts:
Whitetop is a common weed species on alkaline soils, but is not restricted to them. It forms dense patches that can completely dominate sites, resticting the growth of other species or degrading pastures. The species is not toxic to livestock but neither is it grazed. Although it is less common than L. draba, thousands of acres can still be found in Oregon.
Biological
Controls: No approved biological control agent is currently available.
Oregon
Maps of Hairy Whitetop Distribution
Links:
USDA
Plants Database information on hairy whitetop
GRIN
Database information on hairy whitetop
Oregon Department
of Agriculture information on hairy
whitetop
|
