Subregional Aliens

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Waterton National Park

Waterton Park is a favorite place of Alberta Botanists, because of the many plants that occur hardly anywhere else in the Province. What goes for native plants may also be true for Aliens. The literature for the 2007 Waterton Wildflower Festival reports that there are more than 100 species of non-native plants in the Park, and that the following "Dirty Dozen" are their greatest concern (of those Alien species that can be easily identified).

Spotted Knapweed Centaurea maculosa (C. biebersteinii)
Nodding Thistle Carduus nutans
Bull Thisttle Cirsium vulgare
Leafy Spurge Euphorbia esula
Dalmatian Toadflax Linaria dalmatica
Sulphur Cinquefoil Potentilla recta
St.John's Wort Hypercium perforatum
Blueweed Echium vulgare
Hound's-tounge Cynoglossum officinale
Yellow Chamomile Anthemis tinctoria