Linaria vulgaris
Yellow or common toadflax (sometimes referred to as “butter and eggs”) is a creeping-root perennial that spreads by seeds and numerous rhizomes to create dense monocultures. The stems and leaves are narrow and slightly waxy. This plant is extremely adaptable and has been seen growing anywhere from 6-48 inches high, depending on its environment. It has bright yellow snapdragon-like flowers that have an orange center. It produces roughly 3,000 orb-shaped seeds per plant.
Yellow toadflax has been known to grow at elevations well over 10,000 feet—it is even an invader north of the Arctic Circle. This plant prefers disturbed soils, but will invade natural areas through seed introduction. It is considered a major threat to the Greater Yellowstone ecosystem.
For help managing infestations,
please call Teton County Weed & Pest District at 733-8419.
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