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Pacific Northwest Research Station
Blue Mountains National Resources Institute

Forestry and Range Sciences Laboratory
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La Grande, OR 97850

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BMNRI Home > Publications > Weeds > Dalmation Toadflax


Publications: Noxious Weeds

Explosion in Slow Motion: A talk by Jerry Asher about noxious weeds in the Blue Mountains


Click on a weed to learn about how to find it and kill it!


Common Crupina
Diffuse Knapweed
Russian Knapweed
Spotted Knapweed
Purple Loosestrife
Perennial Pepperweed
Puncturevine
Tansy Ragwort
Medusahead Rye
Rush Skeletonweed
Yellow Starthistle
Canada Thistle
Musk Thistle
Scotch Thistle
Dalmatian Toadflax
Mediterranean Sage
St. Johnswort
Leafy Spurge
Whitetop
Dyers Woad

Wanted: DEAD!

Dalmatian Toadflax

  • Stems: Reaching 3 feet. Densely leafed.
  • Leaves: Alternate, entire, lower leaves narrow at base, middle and upper leaves conspicuously broad-based. Leaves are heart shaped, green, and waxy. They grow 1-3 inches long.
  • Flowers: Borne in the axils of the upper leaves. Flowers are 1 inch long, with an extra 1/2-inch spur, yellow with an orange bearded throat. Flowering occurs between May and August.
  • Fruits: Two-celled capsules containing many irregular seeds.

Dalmatian toadflax is a perennial that grows from a branching woody base. Originally native to southwestern Europe, it was introduced to the United States as an ornamental plant. It is difficult to control owing to an extensive root system.


Control should be geared toward preventing spread.

  • Mechanical: Individual plants can be pulled, as long as all lateral roots are removed as well.
  • Chemical: Herbicides applied in early spring before bloom helps. Contact you local weed control office for more information.
  • Biological: Cultivation in early June, repeated frequently with new growth is helpful. Seeding fall grass crops and cultivation after the second year is effective.

Report all sightings to your local Weed Board

US Forest Service - Pacific Northwest Research Station, Blue Mountains National Resources Institute
Last Modified: Monday, 16 December 2013 at 14:18:43 CST


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