close-up of flowersDalmatian Toadflax

Linaria dalmatica (L.) Mill.

Family: Scrophulariaceae

Description and Life Cycle

A perennial, spreading by seeds and creeping root stock. Numerous light-green, smooth stems, 60-120 cm tall, are produced on each plant. Leaves are light green, heart shaped, and clasp the stem. Roots are large, rough surfaced, and somewhat branching, and may extend 3 m or more. Buds appear from the lateral roots, producing new top growth at varying intervals. Flowers, yellow tinged with orange, are "snapdragon" shaped, and up to 4 cm long.

mature dalmation toadflax plantBiological Control Agents


Lethbridge Research Centre.  2006.  Classical biological control of weeds.  Gov. of Can., Agriculture and Agri-Food Canada.  December 1, 2006.

Powell, G. W., A. Sturko, B. Wikeem and P. Harris.  1994.  Field guide to the biological control of weeds in British Columbia.  B.C. Min. For. Res. Prog.