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Spiny-Leaved Sow-Thistle (Sonchus asper)
Image ID: mtr128Tap/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: Montour 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!