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Spiny-Leaved Sow-Thistle (Sonchus asper)
Image ID: ar63L
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·leaf
Other common names: Spiny Sow-Thistle
Introduced
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
Date: 8/31/2003
Notes:
Vert sharply toothed leaves have rounded lobes that fold around the stem.
More photos of this flower
Spiny-Leaved Sow-Thistle may be
easily confused with:
- 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.
