P. boreale has leaves pinnately divided in 13-23 (the first link I posted has the description from Flora of Alberta), so there is considerable overlap there.
P. pulcherrimum is a common alpine here (I've also grown it), and my impression is that it tends to be a looser-leafed, sprawling plant than the one in the photo.
Aside from the skunky smell (and perhaps general habit), the tube length of the flowers may also distinguish these two.
Here's a description of
P. pulcherrimum:
http://linnet.geog.ubc.ca/Atla...
The tube length for
P. boreale: "the 5 lobes slightly longer than the yellowish tube and rounded at the tip".
For
P. pulcherrimum: "the 5 rounded lobes equalling to nearly twice as long as the tube". (Again, some possible overlap between "slightly longer" and "equalling".)
