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Scientific Name

Lepidium draba L. Desv. (formerly known as Cardaria draba) (ITIS)

Common Name

Whitetop, hoary cress, whiteweed, peppergrass, heart-podded hoarycress, hoary cardaria

Native To

Eurasia (Zouhar 2004)

Date of U.S. Introduction

1800s (Zouhar 2004)

Means of Introduction

Possibly introduced as an ornamental (Zouhar 2004)


Crowds out native species and reduces crop yields (Zouhar 2004)

Whitetop (hoary cress)
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Hoary cress (whitetop)


Photo by Steve Dewey; Utah State University

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Distribution / Maps / Survey Status


Selected Resources

The section below contains highly relevant resources for this species, organized by source.

Council or Task Force
Federal Government
State and Local Government
  • Integrated Taxonomic Information System. Lepidium draba. [Accessed Sep 28, 2023].

  • Zouhar, K. 2004. Cardaria spp. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory.