Department Header For Noxious Weed Division
Yellowstone County, Montana
Noxious Weed
Weed Information Contact Department

Hoary Cress (Whitetop)
(Cardaria draba (L.) Desv.)


Photo by Tom Whitson, Roy Reichenbach

Produced by Wyoming Weed & Pest Council in cooperation with Sandoz Crop Protection Corp.

Whitetop Toxic

Whitetop Rosetta

Whitetop Stem

Whitetop Leaf

Whitetop Bloom

Whitetop Plant

Photos from Montana Weed Control Association

Toxicity: Cattle.

Growth Habit: Perennial vine, reproducing from seeds and roots.

Leaves: Alternate, simple, arrowhead-shaped, rounded or blunt tipped.

Stem: Prostrate, twining and mat-forming, up to 10 ft. long.

Flower: Funnel-shaped, pale pink to white, up to 1 in. wide; two small scale-like bracts attached below flower on flower stem.

Roots: Creeping rhizomes, extensive

Seeds: Four per capsule, dark gray to reddish brown, three sided.

Reproduction: Seeds viable over 60 years. Often confused with wild buckwheat which has heart-shaped sharp pointed leaves and tiny inconspicuous flowers.

Biological Controls: Bindweed moth, Bindweed gall mite.

Herbicides: Tordon & 24D, Banvel & 24D.

Video Supplied By Montana Weed Control Association