Common Buckthorn
Rhamnus cathartica, the European buckthorn, common buckthorn, purging buckthorn, or just buckthorn, is a species of small tree in the flowering plant family Rhamnaceae. It is native to Europe, northwest Africa and western Asia, from the central British Isles south to Morocco, and east to Kyrgyzstan. It was introduced to North America as an ornamental shrub in the early 19th century or perhaps before, and is now naturalized in the northern half of the continent, and is classified as an invasive plant in several US states and in Ontario and Québec, Canada.
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Research Mentions
Invasive buckthorn sightings jump 50% across Canada as autumn arrives
The shrub with dark berries and leaves that stay green after your maple and ash have turned is pr...
Invasive buckthorn shrub is spiking in nature sightings this week
That dense thicket of dark green shrubs crowding the edge of your local woods or trail might be c...
Invasive buckthorn is surging in sightings across yards and woods
If you've noticed a shrub with glossy dark berries and thorny branches crowding out everything el...
Invasive buckthorn sightings spike in citizen science reports this week
If you've noticed a dense, dark-berried shrub crowding out everything else along a trail or fence...
Invasive buckthorn sightings in Canada drop but stay high
If you've noticed a shrub with glossy oval leaves and small black berries crowding out native pla...
Invasive buckthorn sightings surge across Canada this week
If you've noticed a shrub with glossy, toothed leaves and dark berries crowding out the understor...
Canadians keep spotting this invasive shrub everywhere, numbers easing
If you walk a wooded park edge or trail in Canada this fall, you're probably passing clusters of ...
Invasive buckthorn sightings stay high across Canada, but easing
If you're pulling woody saplings out of a local woodlot or fencerow, there's a good chance it's c...