Conium maculatum

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

Remarks

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