Conium maculatum

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Legend for Species Pages


Conium maculatum L.
  • ANPC Rank –
  • Moss, Flora of Alberta – Rare
  • Global Invasive Species Database – No
  • NatureServe Rank – Medium
  • Haber, Upland – No
  • Haber, Wetland – No
  • CWF, Status & Invasive Range – Low, Lake Ontario drainage
  • Alberta Revegetation Guidelines – No
  • The Nature Conservancy – Yes, w/ ESA
  • CBCN – No
  • AB Weed – No


Not reported as a problem in Alberta, but does occur here and is a problem in the US.

Poisonous, more so than native Hemlocks (e.g. Cicuta spp.). The philosopher Socrates was compelled to drink a deadly infusion of Conium plants.

[1]Link to Wikipedia, Conium maculatum - "...C. maculatum is native in temperate regions of Europe, West Asia, and North Africa. It has been introduced and naturalised in many other areas, including Asia, North America, Australia, and New Zealand.[2] It is often found on poorly drained soils, particularly near streams, ditches, and other surface water. It also appears on roadsides, edges of cultivated fields, and waste areas.[2] It is considered an Invasive species in twelve U.S. states, including California..."

[2]Link to USDA Plants Profile for Conium maculatum L. poison hemlock

Conimacu XID Conium maculatum2.jpg
Conimacu XID Conium maculatum6.jpg
Conimacu XID Conium maculatum 504.jpg
Conimacu XID Conium maculatum biocontrol2.jpg


Map references

sample: Map data for T. ramosissima