Blecker, L., Creech, E., Dick, J., Gephart, S., Hefner, M., Kratsch, H., Moe, A., Schultz, B. 2020, Nevada Noxious Weed Field Guide – Dalmatian toadflax, Extension, University of Nevada, Reno, Field Guide

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

Photo of dalmatian toadflax plant in front of a lake.

Other

Grows best in dry, well-drained soils; often infests rangelands, waste areas and roadsides; known to occur in Douglas, Elko, Lincoln, Nye 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 aminocyclopyrachlor, chlorsulfuron, imazapic or picloram pre-emergence through bloom or to fall rosettes; repeated applications of 2,4-D, dicamba or glyphosate to actively growing plants

Learn more about the author(s)

Heidi Kratsch

Also of Interest:

Nevada Noxious Weed Field Guide – Dalmatian toadflax