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Perennial Pepperweed
(broad-leaved peppergrass, tall whitetop, Virginia pepperweed)
Brassicaceae
(= Cruciferae), the mustard family
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Background
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 Perennial pepperweed is native to southern Europe and
western Asia. It spreads by seed and creeping roots under many different
environmental conditions.
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Description
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 Perennial pepperweed grows up to 6 feet tall and has
basal leaves that
are lance shaped, have long petioles, are up to 12 inches long, and are
covered with a waxy layer. Stem leaves are smaller and have shorter
petioles, but don't clasp the stem. Leaves have a prominent, whitish
midvein. Flowers are white, less than 1/6 inch wide, and develop in dense,
rounded clusters at the branch tips from early summer until fall. Fruits are
roundish, slightly hairy, measure 1/16 inch in diameter, and contain 2 tiny
seeds.
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Distribution
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 Perennial pepperweed is widely scattered throughout the
U.S. and in many Idaho counties. |
Control
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No biological control agents are available for perennial
pepperweed, but herbicides are available to provide control.
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© 1999 University of Idaho:
Text and photographs for these pages from Idaho's Noxious Weeds, by
Robert H. Callihan and Timothy W. Miller (revised by Don W. Morishita
and Larry W. Lass).
Please contact: Ag Publishing, University of Idaho, Moscow,
Idaho 83844-2240; 208 882-7982 visit the Resources for Idaho website at
http://info.ag.uidaho.edu, for more information about this or other
publications.
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