Growing on dry land in the eastern part of the U.S., Pennsylvania bittercress is a small plant (never more than a foot tall) with 9 to 11 leaflets on its compound leaves. Contrary to the name, this plant is not that bitter, and it can make a great "mustardy" salad base. These tender leaves and stems can be eaten raw or cooked, but don't delay. You'll see them in April in most areas, and that's about it for the year. These short-lived plants grow tiny white flowers with four petals, which give way to popping seed pods. After that, they are swallowed up by the growing grass of spring.