Hollow, smooth, hairless stems with purple blotches or streaks
Finely divided, fern-like leaves that are bright green
Leaves and stems with a strong, unpleasant musty or mouse-like odor when crushed
Small white flowers arranged in umbrella-shaped clusters
Tall growth, often 3 to 10 feet or more
Large, branching clusters of many tiny white flowers
Thick, white taproot
Found in moist areas such as roadsides, ditches, stream banks, and field edges
Resembles wild carrot, parsley, fennel, or Queen Anne’s lace
No hairs on stems or leaves, unlike many similar plants