Definition of sow thistle in English:
A Eurasian plant with yellow flowers, thistlelike leaves, and milky sap. Also called milk thistle.
- Genus Sonchus, family Compositae
- Many people mistakenly group the annual and perennial sowthistles into two species rather than four.
- In South Dakota, perennial sowthistle is concentrated in the northeast and eastern areas of the state.
- Also, the leaf margins of spiny sowthistle are much more spiny or prickly than those of annual sowthistle.
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