Mike ...
Actually, many roses did come over on the Mayflower ...
and other ships going back and forth for trade during the early years of our country's history.
When I first met Kim Rupert, my primary rose mentor, he only talked about roses in lineages and classes. I was a complete novice. He didn't dumb it down for me. Instead, he gave me a long list of non-picture rose books to read and study. He also made me make up my own lineage trees long before they were available on HMF.
It's just a way of knowing roses from a different point of view. It's the growing of roses that is the adventure.