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Photographer: Merel R. Black
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Family Brassicaceae
Thlaspi arvense L.
field pennycress
Thlaspi: from Greek thlaein, "to crush," from the flattened silicle, and the Greek name for a cress
arvense: of planted fields
Hazardous 
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| Status: | Introduced - naturalized |
| Plant: | erect, annual, 4"-20" tall forb, smooth, rank odor |
| Flower: | white, 4-parted, 1/8" wide, petals 2 times as long as the sepals; inflorescence a cluster (raceme) of stalked flowers; blooms April-June |
| Fruit: | roundish, 1/2" wide pod, erect, winged all around, the notch at the tip deeper than wide |
| Leaf: | stalkless, base with 2 narrow lobes |
| Habitat: | disturbed sites |
| (Glossary) |
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