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Biological controls for HOARY CRESS coming soon

 

 

 

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Hoary Cress - Cardaria draba (L.) Desv.

Brassicaceae - (Mustard family)

A deep rooted perennial up to 2 feet tall, reproducing from root segments and seeds. Leaves are blue-green in color, lance-shaped. Lower leaves are stalked; upper leaves have two lobes clasping the stem. Plants have many white flowers with four petals, giving the plant a white, flat-topped appearance. Heart-shaped seed capsules contain two reddish-brown seeds separated by a narrow partition. Plants emerge in very early spring and have bloomed and set seed by mid-summer.

This perennial is common on alkaline, disturbed soils and is highly competitive with other species once it becomes established. It can be controlled effectively with herbicides. Two other Cardaria species, lens-podded whitetop (C. chalepensis L.) and hairy whitetop (C. pubescens (C.A. Meg) Jarmolenko) are common in the western U.S. with differences in seed capsules and fruit used to identify each species.

Non-standard name: whitetop.

(Courtesy of Weeds of the West)

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