Linaria Vulgaris
Yellow Toadflax  


Provincial Noxious. Perennial.
Yellow toadflax has a bright yellow, snapdragon-like flower with an orange spot on the lower lip and narrow, pale green leaves that are pointed at both ends. Flowers are similar to Dalmatian toadflax but smaller. Mature plants are 10 - 80 cm tall.

Yellow toadflax contains a glucoside that is mildly poisonous to cattle, but poisonings are rare as it is generally not eaten. The plant competes with native grasses and can alter species diversity on some sites. Dense populations can reduce forage production for livestock and wildlife.

In British Columbia, yellow toadflax is found in grasslands and open forests, and on disturbed sites such as roadsides, railroads, logged areas, cultivated fields, and gravel pits. It is present in the Peace and Omineca regions but it is abundant in the Okanagan, Similkameen, Thompson, Boundary, East Kootenay, and Cariboo regions.

The plant spreads rapidly from buds on creeping root systems, as well as by wind-borne seed.


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