1. Foetid Eurasian weed having round flat pods; naturalized throughout North America
   "The distinctive round pods of penny grass were visible across the abandoned field";
   - field pennycress, French weed, fanweed, stinkweed, mithridate mustard, Thlaspi arvense

Derived forms: penny grasses

Type of: pennycress

Part of: genus Thlaspi, Thlaspi