While researching for hardy geraniums to add to our garden I ran across this University of Georgia site which compares different G.s and other plants as well. I thought it was interesting because it pictured the whole plant, not just the flower.
Tabasca here in the UK we also have national collections. People who specialise in a certain plant, have to present their plants in a clear way, with record keeping to match. They also have to open their collections to the public so many days a year. Maybe you people in the US could start a similar thing ;)
psilo--are the UK gardens and 'open days' listed in the yellow book by specialty? We travel to the UK quite often and I try to take advantage of garden tours/events when I can. I wish we had a similar thing here--well, maybe we do--I am rather a neophyte to gardening so I don't know much! But it doesn't seem like the average American has the passion for gardening that is so common in the UK (except on DG of course!)
I think h. geraniums are interesting plants, especially for our woodland property and I would like to know more. I found an interesting article by Robin Parer about them (and just ordered some Rozannes and others from her), and of course lots of good pictures and details on your site and from Mark's (?) site in Northern Ireland. I would like to try some seeds in spring although I don't seem to have the germinating touch as others do!.
Thank you for all the information you have posted here and elsewhere!