Campanula rotundifolia (Common Harebell) looks good to me. The leaves vary quite a bit, with a tendency toward being broader with more moisture. These then, fit that pattern well, with several of my field guides depicting narrower leaves.
Common harebells are a diminutive plant with really dainty flowers on wiry stems. I think the pics show a much beefier perennial with big leaves and tall flowering spike. It may well be a garden escapee. http://images.google.com/images?q=C...1I7SUNA_en-GB&um=1&hl=en&ie=UTF-8&sa=N&tab=wi http://www.floralimages.co.uk/pcamparotun.htm
Not sure where you get your ID from, but the first I look at (Audubon N.American Wildflowers) describes a plant 10 - 100 cm. tall with flowers 1/2 to 1 in. The next is Andy MacKinnon's Plants Of Northern BC. He describes a plant 10 -50 cm tall with flowers appearing on thin wiry stems. Could that be what you are referring to? In any case, the species epithet " rotundifolia " hardly suggests a small diminutive plant.
Rotundifolia refers to the plant having round leaves. It might be a tiny leaf or a giant one . It is just describing the shape. I have added a second link above of the wild Harebells in the U.K. As described I believe by Andy Mackinnon. The flowers are just so cute and dainty.
Yes, the first thing I read in the "notes" of MacKinnon is "This is a very variable species". When I look at your link, including the measuring graphic, I do indeed see a much daintier specimen. Perhaps we're looking at a good example of regional and micro-site variation.
Ditto to Silver surfer, this is a Campanula, but not C. rotundifolia (a native species here which I'm very familiar with). Looks more like Campanula rapunculoides.
I perhaps should have made it clearer, that like Michael, I know the Harebell from many first hand encounters. Not just from something that I had read on the net. It is one of the flowers chosen by Cicily Mary Barker for one of her famous Fairy Flower painting. The Harebell Fairy. So dainty. http://images.google.com/imgres?img...en-gb:IE-SearchBox&rlz=1I7SUNA_en-GB&sa=N&um= It is also used as a pattern on certain china products in the U.K http://stock.tablewhere.co.uk/PatternImages/ROQ0055.jpg
Thank you all for your comments. From the photos on the Internet it appears that it is Campanula rapunculoides. Thank you Michael F. troglophile