identification of alpine plant

I found this plant growing above about 2300m on a ridge East of the continetal divide in the Central Rockies (White Goat Wilderness area) I can't find it in my plant books.
Any suggestions?

 

Aster family, have seen it also but don't remember what it's called.

 

looks like a Dwarf Sawwort, saussurea densa in my book

 

Knew it was "Sauss" something.

 

It's Saussurea nuda var. densa, according to the area it was seen in.

 

Thanks. What book are you using. I have the Lone Pine series for all of BC but its not in any of them.

 

I think Ron B and Abgardeneer are not using books but just have a wealth of knowledge. I use various books from the lone pine series. This one I found in "Plants of the Rocky Mountains" (Kershaw/MasKinnon/Pojar, the usual suspects.

 

Flora of Alberta by Moss and Packer. The popular plant picture books are very useful and approachable (and I have a shelf of them), but they are never comprehensive, and they lack the detail to use to distinguish similar species... not that that applies in this case.