The guy that can answer your question is Dr. Lehr who owns New World Orchids; he has tons of different Sedirea and his price list gives a (very) scant description - BUT, email him with your question - he has answered all my emails and is a great guy to correspond with.
The link to his website is:
New World Orchids
I don't know if you have been to his website or now, but he will be able to help I am sure.
Hope this gives you lead for all your Sedirea questions!
Steve