Thlaspi arvense is a common weed known as "field penny-cress" or "wild pepper-grass". This weed is commonly found in fields, meadows, and disturbed areas across North America and Europe. There are many synonyms for Thlaspi arvense, including "white-top", "poverty weed", "lady's smock", and "swinecress". White-top is a reference to the small white flowers that bloom on the weed, while poverty weed refers to the plant's ability to grow in poor soil conditions. Lady's smock is a nod to the plant's similarity to the wildflower of the same name, while swinecress highlights its use as a food source for pigs. Thlaspi arvense may be considered a weed, but its many synonyms highlight its usefulness and adaptability in the natural world.