Spiny Sowthistle

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Leaves and stems.  Key characteristics: leaf margins are wavy and contain prickly spines.  Both leaves and stems have milky sap.

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Flowers.  Key characteristics: yellow and approximately 1 inch in diameter.


Seed.  Seed are ribbed, have a feathery pappus attached to one terminal and the length is slightly greater than 2.0 mm (without the pappus).  

Life cycle: winter annual.