Conium maculatum, commonly known as poison hemlock, is a highly toxic plant native to Europe and North Africa but has spread to North America. It features tall, hollow stems with purple spots, and its leaves resemble those of carrot or parsley. The plant produces small white flowers in umbrella-shaped clusters, typically blooming from late spring to early summer. All parts of Conium maculatum contain potent alkaloids, particularly coniine, which can cause respiratory failure and death if ingested. Historically, it is infamous for being used in the execution of the philosopher Socrates. Due to its toxicity, caution is advised when encountering this plant in the wild.