This is awesome and very encouraging! One day we will be growing sweet tasty citrus in our gardens without the need for a greenhouse. Hopefully not too long from now

Boca Joe, thanks very much for the information please keep us informed.

The seedlings seem to be monoembryonic?

Joe reports that there seems to be a bit of variation in the look of the leaves of the seedlings. Some are sending up multiple shoots which is typical of polyembryony. But one seems to look more monofoliate indicating this is possibly a zygotic seedling?

I think citranges are mostly nucellar. I don't know about Citrandarin offspring though. Does anyone know?

This might be a clue on what this really is.

Do citrandarins tend to give off some monoembryonic seeds? I think I've read that most mandarins are polyembryonic though.

Bernhard Voss in Hamburg raised 18 zygotic seedlings from seeds of Poncirus x C.reticulata "Changsha" citrandarin HRS 899.
He got these seeds from U.S. Horticultural Research Laboratory in Athens, Georgia.

Dave is correct, out of about 18 germinated seeds, one is polyembryonic.

I will also be closely watching the seedlings which many are completely different from each other as far as leaf shape , some unifoliate, elongated and narrow, some are rounded and trifoliate, some in between.

I took closeup photos today of the seedling variations so far. Let me know what you think. The 1st 5 photos in the album were taken today and as you can see , lots of differences. If you put your cursor over the photo, once you click on it, you will see the description I listed for each.

http://bocajoe.smugmug.com/Tropical-Plants-in-a-Non/Northern-VA-MD-Hardy-Citrus/27111507_x5rvZp#!i=2336132326&k=h7SLZq2

Boca Joe

The seedlings look like they are doing well! Is the parent tree evergreen in cold weather or do some of the leaves get fried?

I wonder if it would survive in coastal MA?

-Scott

Joe, last winter we had -28.1 °C = -18.6 °F ...

Guess that is too much ...
I was even surprised that all Poncirus survived that whithout damages ...

Anyways it would help a lot of people ...

what Sanguinello is talking about. There was never -28°C in Vienna. -19,6 was the lowest temperature within the last 50 years.

Is there a way to get this very interesting hybrid to Europe?

how you dare Roberto .... Sanguinellos informations, are always precise

Maybe he wants to grow citrus trees on the top of Grossglockner.

Who said VIENNA ???

People who can read have some advantages ...

So, about which region in Austria you spoke and why?


BTW:
for example.
If, I want to speak about citrus growing in my region, I have no reason to mention temperatures in High Tatra mountains.

I think that is not fair and kind to discuss in this way. I can imagine people who live in the one place and have land in another place. The one is cooler than the other. For example... So if we don't know let's ask. But no ridicule. (Admittingly, I love sarcasm among friends but its not a good idea in the public.)

Very well said Till, but I'm afraid it fell on deaf ears.

Sanguinello had been warned on numerous occasions & could not control himself. End of story for him.