Maybe another name might help a search, Lotte? 
Papaver dubium L. subsp. stevenianum    

Kew plantlist  has: 
Papaveraceae Papaver stevenianum Mikheev 
Bot. Zhurn. (Moscow & Leningrad) 78(5): 123. 1993 
Distribution:Stavropol (North Caucasus, Caucasus, Asia-Temperate)
Type Information
Collector(s): A.Mikheev
Locality: Ciscaucasia prov. Stauropoliensis, vinetum haud procul ab oppido Pjatigorsk
Collection Date:
 1968-5-5  
Type Remarks:
 holotype cited as lectotype in error 
validation of:Papaveraceae Papaver stevenianum Mikheev Byull. Moskovsk. Obshch. Isp. Prir., Otd. Biol. 86(3): 86. 1981 
basionym of:Papaveraceae Papaver dubium L. subsp. stevenianum (Mikheev) Kubát & Šípošová Fl. Slovenska 5(4): 766 (42). 2002 
--------------
Can't say I knew thiswas what it looks like! 
http://caliban.mpiz-koeln.mpg.de/radu/high/Rastenie-69.3_20x30.htmlhttp://www.flickr.com/photos/denjam/4413148799/