Roadside Pennycress Thlaspi alliaceum LinnaeusNon-native    Synonyms: Garlic Penny-cress, Garlic Pennycress, Mummenhoffia alliacea.
Kingdom Plantae   >   Division Tracheophyta   >   Class Magnoliopsida   >   Order Brassicales   >   Family Brassicaceae   >   Genus Thlaspi   

Status:

This non-native mustard was introduced from Eurasia and is rapidly expanding in the eastern U.S.

Description:

Similar to Field Pennycress. Erect stem is glabrous and glaucous with some pilose hairs near base. Stem leaves are alternate, sessile, and clasping. Note strong garlic odor when crushed.

There are 334 records in the project database.

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Roadside Pennycress in Kent Co., Maryland (4/27/2014). Photo by Bill Hubick. (MBP list)

Roadside Pennycress in Frederick Co., Maryland (4/20/2014). Photo by Bill Hubick. (MBP list)

Roadside Pennycress blooming in Worcester Co., Maryland (3/25/2017). Photo by Ashley Bradford. (MBP list)

A homogeneous stand of Roadside Pennycress in Kent Co., Maryland (4/27/2014). Photo by Bill Hubick. (MBP list)

Roadside Pennycress blooming in Howard Co., Maryland (4/7/2014). Photo by Bill Hubick. (MBP list)

Roadside Pennycress in Howard Co., Maryland (4/19/2017). Photo by Bill Harms. (MBP list)

Roadside Pennycress (stem) in Howard Co., Maryland (4/7/2014). Photo by Bill Hubick. (MBP list)

Roadside Pennycress (basal leaves) in Howard Co., Maryland (4/7/2014). Note pilose hairs at base of stem. Plant had strong garlic odor when handled. Photo by Bill Hubick. (MBP list)

Roadside Pennycress in Howard Co., Maryland (5/17/2020). (c) Wayne Longbottom, some rights reserved (CC BY-NC). Photo by Wayne Longbottom. (MBP list)

Roadside Pennycress in Queen Anne's Co., Maryland (4/24/2017). Photo by Wayne Longbottom. (MBP list)

Roadside Pennycress in Queen Anne's Co., Maryland (4/24/2017). Photo by Wayne Longbottom. (MBP list)

Roadside Pennycress in Howard Co., Maryland (5/10/2017). Photo by Bill Harms. (MBP list)

Roadside Pennycress in Harford Co., Maryland (4/24/2018). Photo by Kirsten Johnson. (MBP list)

Roadside Pennycress in Baltimore Co., Maryland (4/29/2018). (c) Charlie Davis, some rights reserved (CC BY-NC). Photo by Charlie Davis. (MBP list)

Roadside Pennycress in Harford Co., Maryland (4/29/2019). (c) susanrich01, some rights reserved (CC BY-NC). Photo by susanrich01 via iNaturalist. (MBP list)


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