have you tried silverhill seeds in south africa---they have an extensive list of various iridaceae on their mail-order list??? just for curiosity sake, are you growing most of your present collection in the ground or in pots----a surprising number of south african iradaceae are quite hardy in the ground in mild parts of oregon.

I am growing at least 1 specie of every genus in Iridaceae offered by Silverhill Seeds. The genra I am looking for have not been offered by Silverhill in at least 2 yrs.