Three plants in Western Quebec

I've just returned from Western Quebec where I observed some plants I cannot identify:
1. Tall shrub with feathery flower
2. Red-stemmed, possibly climbing
3. Red-berry producing small tree-like shrub
4. Dark-red leafed, about 30 inches high

 

1. Aruncus, a goat's-beard.
2. Looks like a hawthorn, Crataegus sp.
3. Some kind of elderberry, Sambucus.

Were these in a gardening situation?

 

Yes, all found in a garden that was planted by previous owners of cottage near Shawville QC.
No. 1 does look like goat's beard. I thought no. 3 was an elderberry but it's different than the one I know. I think you are right.
The leaf doesn't look right for no. 2 to be a hawthorne, but you could be right about that too.

 

Could no. 4 be black snakeroot?

 

2. Spiraea x vanhoutti (or a similar Spiraea sp.)

 

I have another unidentified plant for you - same place.

 

Spirea vanhoutti also known as bridal wreath looks plausible... Thanks

 

Black cohosh (Actaea [Cimicifuga]) was my first thought for number 4 as well.

I think that last magenta flower is Physostegia.

 

That looks like a win. Thanks for quick responses.