Eastern Hemlock-Parsley (Conioselinum chinense)
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- Cow Parsnip
Cow parsnip is a much larger, thicker, stouter plant.
- Poison Hemlock
Poison hemlock has a very stout, spotted stem. Stem of hemlock-parsley is thin and green.
- Queen Anne's Lace
Queen Anne's lace has hairy stems and a central blackish blossom.
- Spotted Cowbane
Cowbane had multiply compound leaves, while hemlock-parsley had a fern-like leaf. Cowbane stems also tend to have steaks or area of magenta tint. These two plants are particularly hard to tell apart, which is problematic due to the high toxicity of spotted cowbane.
- Sweet Cicely
Sweet cicely is a much smaller plant, with less showy flowers.