In South Dakota, perennial sowthistle is concentrated in the northeast and eastern areas of the state. |
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Perennial sowthistle is common in cultivated areas, ditch banks, meadows, and neglected areas. |
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No insect biocontrol agents are presently available for perennial sowthistle in Washington. |
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Also, the leaf margins of spiny sowthistle are much more spiny or prickly than those of annual sowthistle. |
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Young tortoises are fed mainly dandelions, nipplewort, sowthistle, clover and lettuce. |
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A German photographer bagged second place for his stunning image of a spiny sowthistle flower stem. |
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