Yarrow — Positive ID

A feathery-leaved, food-safe plant that shares its early-growth look with two of the deadliest plants in North America.

Dangerous Lookalikes — Positive ID Required

Poison Hemlock (Conium maculatum) — toxic, do not confuse: Genuinely deadly and the highest-priority lookalike risk in this whole plant set. Field test: a smooth, hairless stem with purple-red blotching and a musty odor when crushed means hemlock. Yarrow has a plain hairy stem, a flat-topped (not umbrella-shaped) flower cluster, and no purple markings at all. When in doubt, don't harvest.
Water Hemlock (Cicuta spp.) — toxic, do not confuse: Described as the most violently toxic plant in North America. Resembles poison hemlock in leaf and flower shape; its distinguishing feature is a bulbous, chambered root with oily yellow sap — but don't rely on digging up the root as your ID method. Same flat-topped-cluster, no-purple-markings rule as above applies to ruling it out.

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