Poncirus hybrid ID

[Florian]

A week ago I visited a friend in Ticino who has this trifoliate plant. He always thought it was Poncirus but it is clearly some sort of hybrid. Fruit are glabrous and more orange than Poncirus fruit. The tree is deciduous. No idea about coldhardiness since it is located in one of the mildest parts of the country.

Fruit are ca. 4.5-5cm in diameter and weigh 45-50g. The juice is sour and the fruit do not have any of the sticky resin and little (if any) bitterness. However, there is some strange, unpleasant aroma that I cannot properly describe and which persists for quite a long time on the fingers/in the mouth. A Citrange Rusk that I tasted two years ago had a similar aroma if I remember correctly. One fruit was seedless but the others had quite a few seeds.

Can anybody tell if it is a Citrange or Citrandarin?

I find this one interesting because it is early-ripening. In Eisenhut's nursery, just across the lake, none of the citrus trees were this advanced.

The tree

[david]

I am going with Citrange. Over all pics are good. Seems like the tree bears most of the citrange traits. I have not tasted a citrange that did not some degree of poncrin taste in it. Perhaps I am super sensitive to it.

[Florian]

Thanks, David. Would you venture a guess which Citrange it might be?

[david]

Yes. Thats what it would be...a guess. I think this would be Troyer. This is only a guess based upon your pictures. Its hard to distinguish between the citranges without smelling them hands on. Most of the citranges make a vigorous rootstock and are pretty cold hardy. Not as hardy as poncirus or FDragon but .....

[ilya11]

Troyer is evergreen.

For me it looks like some kind of citrandarin, most probably Forner-Alcaide 5.

[Sylvain]

No FA5 has thin leaflets.

[david]

Not all citranges are evergreen. I have seen Troyer, Carrizo and others that were semi evergreen....some that were completely decidous. I can not tell if this tree is semi or its something else.....