• Yellow Toadflax Infestation 215x150

Category A Weed

Figwort family (Scrophulariaceae)

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Yellow toadflax (Linaria vulgaris)


    • Multiple stems up to 3 ft. tall; woody base; often branched near top; sometimes hairy


      • Alternate; strap-like (linear), 1-2.5 in. long, 0.1-0.2 in wide and lack hair (glabrous) to sparsely hairy; NO leaf stems (petioles); DO NOT clasp the stem; edges (margins) are smooth


        • Snapdragon-like; 0.5-1.5 in. long, bright yellow to white with an orange bearded throat and a yellow spur; clustered along upper part of stem

        • Seed capsules round with two chambers, 0.3-0.5 in. diameter, contain many seeds


          • Creeping root system


            • Grows best in coarse soils; often infests rangelands, waste areas and roadsides; known to occur in Douglas, Elko, Esmeralda, Humboldt and White Pine counties

            • Perennial; reproduces by seed and creeping roots

              Toxic to livestock if ingested in large quantities; historically used as a medicine, a dye and an ornamental

            • Also known as "butter and eggs"


              • Mechanical control (mowing, burning or tillage) is NOT effective

              • Several biological control agents are available

              • Apply dicamba, 2,4-D or picloram before bloom; imazapic or picloram to fall regrowth orshortly after first killing frost