Linaria dalmatica (L.) Mill.
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.
Lethbridge Research Centre. 2006. Classical biological control of weeds. Gov. of Can., Agriculture and Agri-Food Canada. December 1, 2006. http://res2.agr.ca/lethbridge/weedbio/plantcom_e.htm
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.