Peppergrass

Webster's Dictionary of the English Language

·noun The common pillwort of Europe (Pilularia globulifera). ·see Pillwort.

II. Peppergrass ·noun Any herb of the cruciferous genus Lepidium, especially the garden peppergrass, or garden cress, Lepidium sativum;

— called also pepperwort. All the species have a pungent flavor.