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dalmatian toadflax (Linaria dalmatica)
ODA rating: B and T
USDA symbol: LIDA
Oregon distribution of dalmatian toadflax
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Dalmatian Toadflax Plant  
Image courtesy of Eric Coombs, Oregon Dept. of Ag.  
Dalmatian Toadflax Flower  
Image courtesy of Dan Sharratt, Oregon Dept. of Ag. (retired)
Dalmatian Toadflax Infestation

Image courtesy of Eric Coombs, Oregon Dept. of Ag.
If images are downloaded and used from the ODA web site please be sure to credit the photographer.
Perennial; blooms summer to fall. Grows two-three feet tall. Leaves waxy, green, heart-shaped and one-three inches long. Flowers are one inch long and similar to snapdragons. Spreads both by seeds and creeping lateral roots.
This deep rooted perennial out-competes desirable forage plants for moisture and nutrients. Thrives in arid rangelands, pastures, and railways.
Dalmatian Toadflax was introduced in the mid 1800s and is considered an escaped ornamental.  It is a native of the Dalmatian Coast of Croatia in the Mediterranean region.
Distribution in Oregon

Biological controls
Five biocontrol agents are approved for release. Two of these, a flower feeding beetle and a stem weevil, are established in Oregon.
Brachypterolus pulicarius

Calophasia lunula
Gymnetron antirrhini
Gymnetron linariae
Mecinus janthinus