- A perennial Eurasian herb that produces a flat-topped cluster of yellow bracts bearing small flowers. It is a noxious weed in prairie and grassland areas of the US, where it aggressively displaces native plants.
More example sentences
- Euphorbia esula, family Euphorbiaceae
- As agriculture expanded onto the prairies, wild oats and sow thistle, leafy spurge and Canada thistle migrated westward.
- Canada thistle and leafy spurge are two noxious weed species that are increasing in Nebraska.
- Currently there are six noxious weeds in Nebraska, including Canada thistle, plumeless thistle, musk thistle, leafy spurge, spotted knapweed, and diffuse knapweed.