Wonderful list of plants! It's really exciting for me to see someone take on a project like this. I do hope that you will continue to post your experiences and some photos so we can all share this adventure with you; even if some of us can only do it vicariously.
I have some Apios americana; for a project like this I could spare a couple of young tubers.
http://plants.usda.gov/plantguide/pdf/cs_apam.pdf
For your long term Cyp aspirations, try this site:
olsplst
His seedlings are ethically produced - there's no collecting of plants from the wild. He grows them from seed in the lab. The seedlings are small and need a lot of care, but he produces a good product.