Scientific Name Sonchus oleraceus
Family Composites, Sunflower
Flower Color Yellow
Plant Type Forb
Native No
Weed Yes
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| annual sowthistle Scientific Name Sonchus oleraceus Family Composites, Sunflower Flower Color Yellow Plant Type Forb Native No Weed Yes |
 | common cockleburr Scientific Name Xanthium strumarium Family Composites, Sunflower Flower Color Green Plant Type Forb Introduced North America Native No Weed Yes |
 | common groundsel Scientific Name Senecio vulgaris Family Composites, Sunflower Flower Color White, yellow Plant Type Forb Native No Weed Yes |
 | diffuse knapweed Scientific Name Centaurea diffusa Family Composites, Sunflower Flower Color Light Pink Plant Type Forb Native No Weed Yes |
 | marshelder Scientific Name Iva xanthifolia Family Composites, Sunflower Plant Type Forb Native No Weed Yes |
| old-man-in-the-Spring Scientific Name Senecio vulgaris Family Composites, Sunflower Flower Color White, yellow Plant Type Forb Native No Weed Yes |
 | rush skeletonweed Scientific Name Chondrilla juncea Family Composites, Sunflower Flower Color Yellow Plant Type Forb Introduced Yes Native No Weed Yes |
 | Scotch thistle Scientific Name Onopordum acanthium Family Composites, Sunflower Flower Color Purple Plant Type Forb Native No Weed Noxious |
 | spotted knapweed Scientific Name Centaurea maculosa Family Composites, Sunflower Plant Type Forb Native No Weed Yes |
 | yellow starthistle Scientific Name Centaurea solstitialis Family Composites, Sunflower Flower Color Yellow Plant Type Forb Native No Weed Yes |