I believe that Iris reticulata Halkis is a species collection. I have heard the collection attributed to Norman Stevens. From Halkis Dag in Turkey. It is quite different from the north eastern Iris reticulata and hyrcana. Few Tulips mind freezing, I have seen germinating seeds of hardy Iris, Tulip, Frits, Hyacinths....frozen solid with no harm, though freeze thaw cycles, especially after top growth has started, may damage the bulbs. http://www.augisbulbs.com/catalog.php?c=74 Incidentally, I can highly recommend Augis bulbs Peter (UK) On 12 February 2014 19:13, Jane McGary <janemcgary@earthlink.net> wrote: > Iris 'Halkis', a reticulata; not sure if it is a hybrid or a pure > species selection > . The seedlings, including > almost 30 Tulipa species, show little damage despite my eventually > inadequate attempts at keeping them from freezing; even some > Fritillaria species that were just germinating appear all right. > >