Morton fruits are very often distorted, but this was an extreme, probably due to the early fruit damage by spider mite. Below are last November harvest:

Thanks ilya. Yes that photo is common for Morton, but the fingered is not common. Mite damage is probably correct.

Finaly, I asked Mr. Broza and got following answer. :
B. Voss got this plant in 2000, from the hands of the director of university greenhouse.
About the origin. : Mr. Broza asked the founders of greenhouse collections about the origin of this variety several times in the past, but never got clear answer. So ... who knows.

Update,
yesterday, Snek - member of this forum, told me, that there are two different cross between unshiu and poncirus, one from former USSR, which has a bit different leaves, than that usnhiu x poncirus from Prague and also fruit is more like poncirus fruit than satsuma and is more cold hardy, than unshiu x poncirus from Prague.

Yes, there are two different hybrids (Unshiu X PT). One usualy named as (Unshiu X PT Prague, ITSZ). The second most often as the (PT X unshiu, USSR).

The first can be seen in the photos here
http://www.agrumi-voss.de/satsxpon3.jpg
http://www.agrumi-voss.de/satsxpon2.jpg
or on my website
http://www.citrusy.estranky.cz/fotoalbum/mrazuodolne-hybridy/hybrid-_unshiu-x-poncirus-trifoliata_/

The second I have not, but I saw him with my own eyes. Leaves are trifoliate, strongly serrated, fruits are not edible. Like a citrange or trifoliata.

What is certain is that the plant imported B. Voss from greenhouses ITSZ from Prague. ITSZ is the abbreviated name of the Institute of Tropical and Subtropical Agriculture. This is a Faculty of Agriculture University.
If it was imported from the former Soviet Union or there was bred, will remain unknown.

I have some seedlings of this variety. It turned out to be quite hardy. I am sure that "Prague" is SatsumaXFlying Dragon. The second Citsuma seems to be a cross between normal Poncirus and Satsuma. Maybe -like Dragonlime- with "Prague" Poncirus FD was the "mother" and pollen came from C. unshiu.

Sad to hear Rad. R.I.P.

R.I.P


M condolences to the family.

In the last years the grafted scion of my trifoliate Citsuma "Prague"- sport has always flowered but did not keep its fruits. This year I have 4 or 5! They are ripe now and seem to bee "normal" PT-fruits. When I checked my "Prague" tree a few days ago I found a new trifoliate twig on top. It is similar to my "strange thing". Bernhard Voss told me, that he has found such shoots on his plant aswell. But if "Prague" is a chimera -why is the whole Plant that cold hardy? Mine survived last Winter only with sun protection. Minimum temperature -12°C Pictures will follow!

I have fruits on my Pragues. They are not at all like poncirus fruits.
They are far from ripe because we had a very bad spring and all the citrus are 2 months late.
Only the PT are getting ripe.

Sylvain, what do you mean when you say not all like poncirus fruit? Are there some like PT-fruits? I tasted mine in the meantime and had the feeling that these fruits are a bit diffferent from regular PT. Less resin -I tried a PT-Flying Dragon-fruit - an d the juice not bitter at all. If you have both rtifoliate and mono/bifoliate branches you shold cut trifoliate back (or completely get rid of them). They are much more vigorous than the others. At least that is what I saw. I wonder what DNA-analysis could bring out -are these twigs just PT or are they something new?