![Fireweed]()
Fireweed (Chamaenerion angustifolium)
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Attracts pollinators; pioneer species post‑fire |
Sunny open areas; resilient in disturbed soil |
Beneficial for bees; edible leaves/flowers traditionally used |
![Shrubby Cinquefoil]()
Shrubby Cinquefoil (Potentilla fruticosa)
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Butterfly attractor; ornamental shrub |
Dry, sunny slope; low water |
Perennial shrub, long bloom season |
![Western Blue Flax]()
Western Blue Flax (Linum lewisii)
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Pollinator friendly wildflower |
Open prairie; well‑drained soil |
Low maintenance, drought tolerant |
| Regulated Weeds (Noxious, as per Alberta Weed Control Act) |
![Canada Thistle]()
Canada Thistle (Cirsium arvense)
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N/A – invasive |
Grows in disturbed sites, spreads via rhizomes and seed |
Needs eradication by law; spiny perennial :contentReference[oaicite:2]{index=2} |
![Leafy Spurge]()
Leafy Spurge (Euphorbia esula)
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N/A – invasive |
Forms dense stands via creeping roots; toxic sap |
Causes dermatitis; must be destroyed :contentReference[oaicite:3]{index=3} |
![Yellow Toadflax]()
Yellow Toadflax (Linaria vulgaris)
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N/A – invasive |
Spreads from seed and roots; drought tolerant |
Nuisance noxious weed; resembles snapdragon :contentReference[oaicite:4]{index=4} |
![Diffuse Knapweed]()
Diffuse Knapweed (Centaurea diffusa)
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N/A – invasive |
Invades disturbed rangeland; prolific seed head |
Highly competitive; prohibited weed in Alberta :contentReference[oaicite:5]{index=5} |
![Scentless Chamomile]()
Scentless Chamomile (Tripleurospermum inodorum)
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N/A |
Annual; bushy stems, daisy‑like blooms |
Common noxious weed; spreads rapidly :contentReference[oaicite:6]{index=6} |