I wonder if there's a Canadian herbarium with a database similar to the Rocky Mountain Herbarium http://www.rmh.uwyo.edu/data.php. Surely there is. Well, look what I found. http://vascularplant.museums.ualberta.ca/details_species.aspx?key=8749
The USDA stuff is kind of, well, um, you know. I got the LBJ Wildflower center to change the name of Vernonia lindheimeri var. leucophylla to the correct Vernonia larseniae, but they were unable to change Salvia leptophylla to S. reptans because of the four-letter USDA code, which has to match. (This is the sort of thing I spend my time on.)
Getting people to change it from Penstemon Schmiedel to Penstemon Mitchell is another story entirely. Not really worth the trouble.
extreme western edge of Denver, Colorado; elevation 1705.6 meters, average annual precipitation 30cm; refuses to look at thermometer if it threatens to go below -17C
Wait ....this is even better. http://digitallibrary.uleth.ca/cdm/search/collection/herbarium/searchterm/Penstemon%20albidus/order/nosort
Better in the sense that if you gave me an hour, I could tell you exact locations for every specimen of P. albidus in the province.