Dalmatian toadflax (Linaria dalmatica)


Category A Weed

Figwart family (Scrophulariaceae)

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Stem

  • Up to 4 ft. tall, lacks hair (glabrous), waxy and branched near the top

    Leaves

    • Alternate and dense; lance-shaped to heart-shaped, 1-2.5 in. long, blue-green color, lack hair and waxy; bases clasp the stem; edges (margins) are smooth

      Flower

      • Snapdragon-like; 1.5-2 in. long; yellow with an orange-bearded throat and a long spur; clustered along upper part of stem

      • Seed capsules round (less than 0.3 in. diameter) with two chambers, each containing many seeds

        Root

        • Creeping root system

          Other

          • Grows best in dry, well-drained soils; often infests rangelands, waste areas and roadsides; known to occur in Douglas, Elko, Lincoln, Storey, Washoe and White Pine counties

          • Perennial; reproduces by seed and roots

          • May be toxic to livestock if ingested in large quantities

            Control

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

            • Several biological control agents are available

            • Apply chlorsulfuron, imazapic or picloram, through bloom or to fall rosettes; repeated applications of 2,4-D, dicamba or glyphosate to actively growing plants¬†