07/26/2026
Reminder: We have another walk in the woods Tuesday! A Walk in the Woods - iNaturalist edition
At our plant ID walk, we were talking about different kinds of clover, so thought some of you might enjoy this graphic shared by the vet in DC.
Alsike clover lacks the "V" on the leaves and leaves are slightly serrated. Of our three common clover (Trifolium genus), it's the one that can harm livestock. It's a *hybrid* of white and red clover, all three introduced species in our region.
We've also seen a lot of lesser trefoil (T. dubium) around this year, it's another introduced neighbour that can be a bit weedy, especially in yards. Do you have a lawn covered in tiny clovers with yellow flowers?
These are all naturalised plant species, meaning they were introduced from elsewhere but have established in our ecosystems. Like other plants (including our native plants) in the pea family, clovers enrich the soil and can provide forage for wildlife. We tend to only class things as "invasive" if they threaten human life or property... but naturalised species can also be hyperabundant and outcompete our native plants, contributing to ecosystem imbalance.
Native species that support nitrogen fixation include creamy peavine (Lathyrus ochroleucus, called "pale vetchling" in iNaturalist); green alder (Alnus alnobetula); and American vetch (Vicia americana).
We bet we'll see some of these plants Tuesday! But you don't have to take our word for it: https://www.inaturalist.org/projects/charlie-lake-community-science.
⚠️ Alsike Clover Can Be Deadly to Horses ⚠️
Every summer, we treat horses affected by alsike clover poisoning. While not every horse grazing a pasture will be affected, those that preferentially eat alsike clover can develop serious illness, and in severe cases, the condition can be fatal.
Common signs include:
🐴 Sunburn-like scabs or sores on the face and hooves (especially on white markings)
🐴 Unexplained weight loss
🐴 Changes in behavior, including lethargy, weakness, or aggression
Many horse owners are surprised to learn that alsike clover can remain toxic even after it has been cut and baled into hay. When purchasing hay, ask about clover content and inspect bales carefully.
Unfortunately, much of the clover found throughout the Peace Region is alsike clover.
The good news? When caught early, most horses recover well with treatment.
If you have concerns about your horse or would like help identifying alsike clover in your pasture or hay, contact our Large Animal Team at 250-782-1080.
Photo credit Horse DVM