Field Pennycress (Thlaspi arvense)
Mustard Family
Winter Annual

 

Field pennycress seedlings emerge in the autumn, a winter annual.  Seedlings (left) and larger plant with seedling surrounding it (right): 

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In the spring the plant continues to grow vegetatively, and quickly "bolts", forms an extended stem and flowers:

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The seeds mature on the parent plant, the flowers are lost, and the distinctive "penny" shaped capsules become apparent

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©jdekker-1998

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