hoary cress

noun
variants: or

hoary peppergrass

or

hoary pepperwort

Definition of hoary cress

  1. :  a perennial cruciferous European herb (Cardaria draba) with clasping stem leaves, clusters of small white flowers, and reniform or cordate depressed pods that is naturalized widely in America and often becomes a troublesome weed in the western U.S.

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