Chris Evans, River to River CWMA, Bugwood.org

Hoary cress; Whitetop

Cardaria draba

Hoary cress; Whitetop (Cardaria draba) is an invasive plant. It was first detected in Missouri in 1987.

This is a creeping perennial, which reproduces by seed and creeping roots. It grows in waste places, cultivated fields, and pastures and now infests about 32,000 acres across Montana.

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