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Close-up of a Linaria vulgaris, or common toadflax, showing clusters of yellow and pale cream flowers against a blurred green background. Common toadflax (Linaria vulgaris) A single stem of toadflax (Linaria vulgaris) with clusters of pale yellow flowers stands against a blurred green background.
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Also called:
yellow toadflax or common toadflax
Related Topics:
toadflax
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Close-up of a Linaria vulgaris, or common toadflax, showing clusters of yellow and pale cream flowers against a blurred green background.
common toadflax Common toadflax, or butter-and-eggs (Linaria vulgaris).

Butter-and-eggs

plant
Also known as: Linaria vulgaris, common toadflax
Written and fact-checked by
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Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree....
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•History

Butter-and-eggs, (Linaria vulgaris), perennial herbaceous plant of the Plantaginaceae family, native to Eurasia. The plant is widely naturalized in North America, where it is considered an invasive species.

Butter-and-eggs grows up to 1 metre (3.3 feet) tall, bears narrow flax-like leaves, and produces showy yellow and orange flowers that are two-lipped and spurred like snapdragons. Seeds are borne in a capsule fruit and feature a small notched wing for wind dispersal.

The Editors of Encyclopaedia BritannicaThis article was most recently revised and updated by Melissa Petruzzello.