Thanks for the imput Bob... I have also been in contact with Yuval Sapir and Ori Fragman and learned a lot from them. As far as know Yuval is not at Indiana University anymore and his homepage there does not work anymore... For those interested the Aril Society Website is : http://www.arilsociety.org/ (I plan to join this year)... Looking more closely to references on Iris bismarkiana, I found the following one: Sapir, Y., A. Shmida and H. P. Comes. 2001. Iris bismarckiana in Israel and Jordan - new findings and taxonomic remarks. Israel Journal of Plant Sciences 49(3):229-235 If anybody has access to this paper I will be most happy to get a copy... pdf or paper... Luc