pboiney wrote: This plant grows wild in a semi-wooded area behind my house, and is spreading aggressively. When crushed, the leaves smell of horseradish, as does the root, which resembles a slender parsnip, but is white. The plant has small white flowers now, which you can almost make out in one of the pictures. Left alone, it'll grow to about three feet tall. I don't find anything like it when I look up wild horseradish.