Amazingly hardy hybrid, but certainly neither citrumelo nor citrange.

Interesting plant!
The end of the video suggests to give this plant a try. I'd love to!

Leaves resembles those of tangor Temple x poncirus Flying Dragon hybrid,
picture posted somewhere on GardeWeb forum by Don OKC years ago:

It looks very decorative ... now the fruits would be interesting ...

Don is a member here, but hasn't posted in a while. He also had a website which has disappeared.

Leaves are very similar, but the mother plant should be already mature in 2006 for fruits to be presented on SE Citrus Exposition.

It has some logic
Finaly I found the original article:
http://forums.gardenweb.com/forums/load/citrus/msg0319542312615.html
He mentioned 250 seedlings, - may be that man got seedling, not seed on expo and do not remember it

OK, but he describes monofoliate plant, while Virginia citrus is clearly trifoliate.

This plant sounds wonderful. I'd really love to get scion wood to graft and work with for breeding. If anyone here is involved with this plant please send me a message or e-mail.

Does anyone remember if Don went to that Citrus Expo? I remember him writing that 50% of Temple x Poncirus hybrids were 0 degree F cold hardy.

Do you know, Ilya, how to contact those people who made the videos and pictures from the amazing hybrid in Washington?

Till,
Bocajoe is participating in Hardy Palm and Subtropical Board
I suggest you register there and contact him by PM

Greetings all,

I might be able to shed some light on the mystery fruiting citrus in Northern Virginia (USDA zone 7A)

I believe I picked up this plant from Stan McKenzie (I think) at the Citrus Expo in VA Beach in Nov 2006. I can't recall for sure though.

I 'think' I recall that it was labeled as Citrandarin -- and that's what Stan recalls that he was selling. The plant WAS labeled, but the label had long since been lost. That sometimes happens when you plant something and then forget about it. It was planted by a friend of mine near Leesburg, VA, under his Trachy palms.

Several 'hardy citrus' gurus who have seen pics of the fruit seem to think it some kind of Citrange -- perhaps 'Rusk'. But Malcolm Manners down in Florida isn't convinced it's Rusk because of the leaves. Also, Rusk is 'supposed' to have fewer seeds. That's one reason why Rusk grew out of favor as a rootstock. Can't reproduce near enough.

This fruit had at least 10 seeds per fruit.

In any case, we're growing up the seeds. And I hope to do some grafting onto P.t. seedlings, maybe this summer.

There's not really enough fruiting wood on this plant to sacrifice mature budwood. Although it's not my tree, so it's not up to me.

Hopefully the tree will get huge and will be the 'Holy Grail' hardy citrus -- or at least the best we can hope for in zone 7a!

Cheers!

Dave

The fruit does look like Rusk. The tree I collect my fruit from does have different leaves, but the fruit do contain 6-10 seed per fruit. Interesting tree though.

Klemmd, thanks a lot.
Actually when I saw your video my first reaction was that it was citrandarin, probably with Changsha.
If your friend is not protecting his Trachycarpus, so probably the microclimat there is more on zone 8 side.
Still, its hardiness combined with lack of poncirus aftertaste is amazing.

Does anyone have any photos of 'Rusk' leaves? Are they more rounded? Do you think this might be some kind of Citrandarin?