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Common Sow-Thistle (Sonchus oleraceus)
Image ID: ahgh52Tap/mouseover and drag to zoom/pan.
Other common names: Milk Thistle
Family: Asteraceae (Sunflower)
Height: 1 to 8 ft.
Blooms: June to October
Leaf Type: toothed
Bloom Size: 0.75 in. (typical)
Flower Description: Flat or rounded clusters, Parts indistinct
Location: Allegheny Highlands Trail
More photos of this flower
- Spiny-Leaved Sow-Thistle
Common sow-thistle has a deeply lobed leaf, while spiny sow-thistle has a leaf that is just slightly toothed.
- Yellow Hawkweed
The sow-thistle has a leaf that is stiff and deeply lobed, while yellow hawkweed has a softer leaf with a smooth edge.
We started out as wildflowers from the bicycle trails of western Pennsylvania, but we've grown!
Meyer, Joseph E. (1918). The Herbalist and Herb Doctor. Hammond, Ind.: Indiana Herb Gardens. 400 pp.