CHRYTOSA HYBRIDS
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
BERLIN CHRYTOSA (Reg. 1993)
 Chrytosa-hybrid II
 Chrytosa-hybrid III



Chrytosa-Hybride IV
Chrytosa-Hybride VI
SSTT733
Chrytosa-hybrid IV
 Chrytosa-hybrid VI
 SSTT733

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