Sibtosa Gallery From Tamberg's 2005 website "SIBTOSA HYBRIDS (DIPLOID) Hybrids with 2n=33 chromosomes, which may be derived from the species Iris sibirica, Iris s...
(SPX) Species Hybrids Species Cross is a horticultural class for hybrids. Although this class was the last to be created it, represents Irises that are the earlie...