This rust affects Enchanter's nightshade as the primary host, but is not a gall-causer on this host.  Uredinia are produced on the leaf undersides, on pale areas of the leaf. 

The alternate host is Abies (Silver-fir).  Spermogonia and aecia are borne on the leaves, but it is not listed as a gall-causer on this host in Redfern & Shirley 2023.

host

Photograph the rust on the host.  Ensure you have noted the host-plant species in your comments

Enchanter's Nightshade