Authentic Wisconsin.  Field Pennycress - Thlaspi arvense


Field Pennycress retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.


Above: Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin (5/5/21).


Field Pennycress - Thlaspi arvense

Field Pennycress is a common weed that is part of the mustard family. It is an introduced/naturalized plant in Wisconsin that grows in disturbed sites. It rarely invades undisturbed natural habitats. Whereas, the flower is not all that interesting, the penny-shaped seed pods are distinctive and are often used in flower arrangements.

Field Pennycress grows 4"-20" tall. The white flowers heads create a dense raceme with numerous small flowers in each head. Each small flower is about 1/8" side and has four petals.

Blooms April-June.

Field Pennycress in Wingra Park on shore of Lake Wingra on June 20, 2020.


Above: Field Pennycress with distictive seed pods in Wingra Park on shore of Lake Wingra (6/20/20).


For more information on the Field Pennycress, visit Wikipedia.

Or, visit the UW-Madison Wisconsin Herbarium online virtual flora website page on Field Pennycress.

Or, visit the UW-Madison Wisconsin Horticulture Division of Extension website page about Field Pennycress.


Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.
Field Pennycress in Oak Savanna in Madison, Wisconsin on June 25, 2020.
Field Pennycress in Oak Savanna in Madison, Wisconsin on June 20, 2020.
Field Pennycress next to sidewalk on Monroe Street in Madison, Wisconsin on May 8, 2021.
Field Pennycress next to sidewalk on Monroe Street in Madison, Wisconsin on May 8, 2021.
Field Pennycress next to sidewalk on Monroe Street in Madison, Wisconsin on May 8, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 12, 2021.
Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 14, 2021.
Field Pennycress in UW Arboretum's native gardens in Madison, Wisconsin on May 15, 2021.
Field Pennycress along sidewalk next to Oak Savanna in Madison, Wisconsin on May 17, 2021.
Field Pennycress along sidewalk next to Oak Savanna in Madison, Wisconsin on May 17, 2021.
Field Pennycress along sidewalk next to Oak Savanna in Madison, Wisconsin on May 17, 2021.
Field Pennycress in Wingra Park on shore of Lake Wingra on June 19, 2020.
Field Pennycress in Wingra Park on shore of Lake Wingra on June 20, 2020.
Field Pennycress in Wingra Park on shore of Lake Wingra on June 19, 2020.

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Wisconsin Wildflowers


Field Pennycress
Thlaspi arvense


Field Pennycress next to Oak Savanna parking lot in Madison, Wisconsin on April 7, 2021.


Above: Field Pennycress next to Oak Savanna parking lot in Madison, Wisconsin (5/07/21).


Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.

Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.

Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.

Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 5, 2021.


Above: Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin (5/05/21)


Field Pennycress next to playground in Wingra Park in Madison, Wisconsin on May 5, 2021.


Above: Field Pennycress next to playground in Wingra Park in Madison, Wisconsin (5/5/21).


Field Pennycress flowers near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.

Field Pennycress leaves near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 4, 2021.


Above: Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin (5/4/21).


Field Pennycress leaves near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin on May 21, 2021.


Above: Field Pennycress near retaining pond on corner of Manitou Way and Nakoma Road in Madison, Wisconsin (5/4/21).


1906 Field Pennycress botanical illustration.


Above: 1906 Field Pennycress botanical illustration


1917 Field Pennycress botanical illustration.


Above: 1917 Field Pennycress botanical illustration


1796 Field Pennycress botanical illustration.


Above: 1796 Field Pennycress botanical illustration


Field Pennycress specimen collected on October 1958 near Potosi, Wisconsin.


Above: Field Pennycress specimen collected on October 1958 near Potosi, Wisconsin.


Field Pennycress.

Field Pennycress.

Field Pennycress.

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