Pennycress – Thlaspi arvense – non-native
This invasive plant tends to reside on cultivated land rather than undisturbed natural habitats. Pennycress leaves are edible but develop a very bitter taste when the plant develops flowers. There is an increasing biodiesel market centered around pennycress, and the seed meal left over after the plant’s oils have been extracted can be processed into plane fuel, livestock feed or human protein additives.
Sources: Britannica
Wisconsin Horticulture
St. Louis Public Radio
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