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Dalmatian Toadflax
Scrophulariaceae,
the figwort family
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Background
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 Dalmatian
toadflax is native to the Mediterranean region. It is likely an escaped
ornamental plant that is an invader of dry timber and rangelands. Dalmatian
toadflax spreads both by seeds and roots.
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Description
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 Dalmatian
toadflax is a
perennial that grows up to 4
feet tall. Waxy green leaves are heart shaped, 1 to 3 inches long, and clasp
the stem. Flowers are 1 inch long (excluding the 1/2-inch spur), yellow,
often tinged with orange or red, and similar in shape to snapdragon. Plants
flower from midsummer to fall. Seeds are produced in a 1/2-inch pod and are
irregularly wing angled.
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Distribution
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 Dalmatian
toadflax is primarily a weed of the intermountain West, including most
counties in Idaho, but a population also exists in the Great Lakes region.
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Control
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A biological control agent (defoliating moth) is available, and its
effectiveness has been very good in Idaho. This weed can be controlled with
herbicides.
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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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