Frank , I think the seeds came from Ebay in france by a seller called
Bananapalm292. He used to have lots of different types and they were a good price.
I should keep a record of where I get my seeds from really as I am often asked.
I have yet to find the true white seeds of Nagensium. Sunshine seeds list 3 types of Nagensium
http://www.shop.sunshine-seeds.de/
I have Cheesmanii too so I will have a look to see if there,s a difference.
I also have another Nagensium that has a darker midrib than the one in the previous pics.