Besides the maps, I keep a record of what daylilies I gave to whom. Most of my friends do not tag their flowers, so this way I can tell them if they ask me what the name is.
I also keep a record of the daylilies I purchased with info and a picture. Nothing fancy, but below is a small sample. I also have another spreadsheet listing the hybridizer and year of introduction. Could have put them on the same spreadsheet, but didn't.
In most cases I also list where I bought the daylily. Since these don't have a specific place mentioned, these three came from Lakeside Daylilies where the majority of my daylilies were purchased.