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Spiny-Leaved Sow-Thistle (Sonchus asper)
Image ID: ar63Tap/mouseover and drag to zoom/pan.
Other common names: Spiny Sow-Thistle
Family: Asteraceae (Sunflower)
Height: 1 to 5 ft.
Blooms: June to October
Leaf Type: toothed
Bloom Size: 1 in. (typical)
Flower Description: Individual flowers, Parts indistinct
Location: Allegheny River Trail
Notes: Vert sharply toothed leaves have rounded lobes that fold around the stem.
More photos of this flower
- Common Sow-Thistle
Common sow-thistle has a deeply lobed leaf, while spiny sow-thistle has a leaf that is just slightly toothed.
- Yellow Hawkweed
Leaves of the sow-thistle are stiff with thorns.
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.