Hybrids with 2n=39 chromosomes, derived from the species of the Chrysographes  group (Iris chrysographes, Iris delavayi, Iris clarkei, Iris bulleyana, Iris forrestii und Iris wilsonii) on one side and forms of  Iris setosa on the other side. Such hybrides are sterile at the diploid level, because the chromosome numbers of both parents are different and their chromosomes  are not analogue. -  Chrytosa hybrids are normally healthy and hardy  garden plants forming long living clumps with a species-like habit. The are difficult to produce. It needs a large number of controlled pollinations to get one or two viable seeds. Therefore, a conversion to the tetraploid level has not been managed so far in this way.

Berlin Chrytosa

Cgrytosa-Hybride II

Chrytosa-Hybride III


Chrytosa-hybrid II

 Chrytosa-hybrid III

Chrytosa-Hybride IV

Chrytosa-Hybride VI


Chrytosa-hybrid IV

Chrytosa-hybrid VI



An alternativ way of producing tetraploid and, therefore, fertile Chrytosa hybrids is the crossing of Tetra-Sino-Sibiricas with tetraploid forms of Iris setosa. Such a cross of us has produced a seedling, which flowered in 2000 for the first time. It produced a single seed after self pollination. The resulting seedling should flower in 2003. The mother plant of this seedling is shown in the following picture.

"Starting Chrytosa"

Back to   Frontpage   Iris hybrid listing         Forward to   Chrysmatica hybrids     Daylily breeding     Plant offer