![](https://images.ctfassets.net/l2hapltrg3cz/3l99uxrdMPsgGVnt76JURJ/bb83d096e2a3f19da62be6fdadaef20b/field_penny_cress_01.jpg?fm=webp&w=1080&q=85)
Field penny-cress
Thlaspi arvense
Importance
Annual weed found in arable land and wastelands throughout Britain.
![](https://images.ctfassets.net/l2hapltrg3cz/7mMtdzY38CkoBvTlpxQyKs/083ae0f603dbd959ffebd6db316bf676/field_penny_cress_01.jpg?fm=webp&w=1920&q=85)
1. Cotyledons oblong and curved over at tip. Leaves are light and bright green.
![](https://images.ctfassets.net/l2hapltrg3cz/1rLP0wtEYXFSmGAa0xZkw1/6921473e65a1c5011e2e638303895209/field_penny-cress_02.jpg?fm=webp&w=1920&q=85)
2. Mature plant is erect and leafy with small white flowers. Produces flat and circular seed pods like pennies. Plants smell when crushed.
![](https://images.ctfassets.net/l2hapltrg3cz/6XR0sXsAWja7KRyn5M2lbE/7987bd31fb2cc41b2e0eb358fde82fa9/field_penny-cress_03.jpg?fm=webp&w=1920&q=85)
3. First true leaves oval and later leaves have projecting teeth at tip.
![](https://images.ctfassets.net/l2hapltrg3cz/1h0qvud54Zy9GzLekPOd5R/677728ff5c36c4492f44e69e75b97e83/FieldMate_Promo_Mobile.jpg?fm=webp&w=3840&q=85)
![](https://images.ctfassets.net/l2hapltrg3cz/3CvKagUshwoSyxEDqRj52c/bd6e3be09e808d22cf4c4c324b6d4ac7/FieldMate_Promo_Desktop.jpg?fm=webp&w=3840&q=85)
![](https://images.ctfassets.net/l2hapltrg3cz/3CvKagUshwoSyxEDqRj52c/bd6e3be09e808d22cf4c4c324b6d4ac7/FieldMate_Promo_Desktop.jpg?fm=webp&w=3840&q=85)