Unknown Canadian weed

This question popped up on a Norwegian site. Somebody has bought a property in Toronto. This weed(?) is everywhere:

 

http://www.biologforeningen.org/enbiolog/topic.asp?TOPIC_ID=44447

Comments

Lori S.'s picture

Sat, 06/07/2014 - 10:18pm

Looks like a shrub of some sort.... ??  I mainly just wanted to say that there are no "Canadian" weeds, only introduced European ones!    Big Grin

Thu, 06/12/2014 - 9:25am

Yes, a shrub or a tree: I think they are runners from a kind of Populus or something like that.

And you are right about the weeds! I have no Canadian ones in my garden, just European ones! (The worst one is Circaea lutetiana)

Lori S.'s picture

Sat, 06/14/2014 - 8:22am

Not Populus.  It looks somewhat familiar but I can't put my finger on it.

Tue, 08/26/2014 - 11:11am

A young Rhamnus?? Around Toronto you might get the native Rhamnus alnifolia (in wetlands) or either of two non-natives, Rhamnus cathartica and Frangula alnus (formerly Rhamnus frangula).