All of citrus I have in ground are 3 of these, 4-5 years old, none flowered yet. This one is more than 3 m high.
http://www.ptice.net/modules.php?full=1&set_albumName=album12&id=PF_x&op=modload&name=gallery&file=index&include=view_photo.php

Looks to me as Frost variety found here:
http://www.homecitrusgrowers.co.uk/poncirustrifoliata/poncirus.html

Is it Frost, any thoughts?

Initially I was attrackted to their parrent plant, growing in nearby village - about 20 years old and 3+ m high, by such big thorns. Never seen anything like that before I picked up several seedlings.
Last autumn, 2006, I eat a few kg of fruits, taken from that parrent plant, making lemonades (mixing with juice from ordinary lemons + some sugar and using ordinary and mineral water). And contrary to what I've read about Poncirus on the web I lemonade quite delicious.
Lemonade had very nice light green color.
Fruits was full of seeds, seed tasting too bitter for me.
And the best part:
When juice was squeezed and seeds removed, using spoon I dig pulp and taste: mmmmmmmmmmm I felt a few tastes, kiwi comes first to my mind then strawberry and then unidentified taste but present in local fruit ice creams...

The best taste had fresh fruits, qualitiy dropped with time in refrigerator...

Maybe I was too excited, I shall repeat experiment this year...
and use more people

My Meyer lemon, flowering 2005:
http://www.ptice.net/modules.php?set_albumName=album12&id=Limun_P9280370&op=modload&name=gallery&file=index&include=view_photo.php
I'm the worst enemy of my favorite plant, eh...
It's strugling for life more than a year now...will see in the spring.

Hello Ivica. The picture of the 'Frost' Poncirus was on my web-site. I obtained the seeds of that variety from the citrus collection at Riverside, California. There are quite a lot of named selections of Poncirus in USA, and at other collections. See
http://www.ars-grin.gov/cgi-bin/npgs/html/tax_site_acc.pl?RIV%20Poncirus%20trifoliata
Although Poncirus is usually not easily cross-pollinated, it clearly does have variations from seed. Poncirus is nearly always propagated from seed, so some of these non-typical plants have been collected and named.
Now, I don't actually know if my Frost seedlings are the same as the parent plant in USA, but because they are all very similar, I assume they are. But here in England, they haven't proved to be very vigorous - perhaps they prefer more sun!
The photo of your plant in Croatia does have leaves similar to my Frost, but I think it very unlikely that it would have been propagated from that particular plant in California. It is probably just a seedling which happens to have similar leaves.
I have also made 'lemonade' from Poncirus fruit and not found it too terrible. Certainly, the taste doesn't make me feel immediately ill, as some people report.
Mike aka Citrange.

Mike,
I enjoy visiting your site for a couple of years - thank you very much.

Reading Observations details (from ars-grin link) for Frost I see that 'my' Poncirus could have a few differencies, fruit size bigger about 1 cm, fruit shape more spheroidal, ...

This year I will try to collect proper observational data & photos.

Best regards.

Ivica, I looked through all of your pictures. Besides citrus you must also be interested in insects, and small animals like lizards, and frogs.. - Millet

Ivica, Enjoyed your pictures. In looking at the citrus with the trifoliate leaves I am wondering if it might be a trifoliate hybrid, instead of a pure trifoliate. Two things make me ask this question. (1) The picture. (2) The fact that you seem to find it tastes ok. Maybe that was because you used a lot of lemon juice - my mom use to use lemon juice to help hide the taste of castor oil too! (It didn't work. That is a taste that cannot be disguised.)

Ned I also noticed the leaves do not look like standard trifoliata leaves. I believe you are correct that it is some type of hybrid or maybe a citrange.

Thank you all.

Millet:
Besides being (newcomer) citruholic I'm birdoholic too
What you saw is 1 album of 13 contained at:
http://www.ptice.net/modules.php?set_albumName=album17&op=modload&name=gallery&file=index&include=view_album.php

Mostly the same photos (with comentary on english) are also at:
http://www.birdforum.net/pp_gallery/showgallery.php/cat/500/ppuser/7076

Hawfinch is my favourite bird.


Ned & Laaz:

Ned wrote:

... I am wondering if it might be a trifoliate hybrid, instead of a pure trifoliate...

That crossed my mind too. Unfortunately I have nothing to compare with.
I do not know for any other Poncirus in vicinity yet. Croatia has citrus area, that is Delta of Neretva river with plantages of lemons, mandarines, kiwis... which I shall have to explore...

BTW, whole fruits of my Poncirus smels like ... well, remainds me on smell of quince fruit.

Ivica, If you can post a picture of the fruit with a ruler, or some standard reference, so we can tell how big it is, we might be able to tell you. Include a picture of the fruit cut in half, so we can get a view of the inside, and a closeup of a seed. A closeup of a single leaf laying on a flat surface would be helpful too (maybe taken with the picture of the seed), but the fruit picture will most likely be enough.

Ned

Ned,
Unfortunately no fruits left (or photos collected) from the last sezone.
I will collect/post as much photos as needed this year, starting with bloom period.

In the meantime,
I'm intrigued with this 4-5 years old Poncirus seedling (from the same mother plant we are talking about):
http://www.ptice.net/modules.php?set_albumName=album12&id=PF&op=modload&name=gallery&file=index&include=view_photo.php

Photo taken 10 minutes ago.
Poncirus is 19 cm tall, half of which is 2006 year growth.
New growth still has leafs!
Location is north side of the house, partilaly shielded from direct north winds. It is 3rd or maybe 4th winter that plant is surviving there.
Tallest seedling from the same generation is more than 3 m tall.

-ivica

Owner of mother plant of my seedlings had 4 fruits, deeply frozen, in refrigerator.

Now, photos:
All photos taken today, 2007-01-12.

1. Mother plant and owner
He got that plant from a men in Malinska (Krk Island, Croatia) ~26 years ago as 10 cm tall seedling. Man told him that the name of the plant is 'sibirski limun' (translated: Siberian Lemon).
Fruited for the first time at age of 8 years.
[img=http://img69.imageshack.us/img69/3139/p1010001wtd1.th.jpg]

2. The Four Fruits
On the top of photo is ruller (centimeters) for size reference.
First row contains 4 trifoliata fruits, second row has Clementine, Lemon and Orange (fruits from market) as color reference. The last two fruits in 2nd row are unrippen fruits found under the tree, these are from the second bloom - flowered in August.
[img=http://img290.imageshack.us/img290/3648/p1170041wow1.th.jpg]

3. Fruit cut - Two of 4 fruits are cut in half
Remark: be aware that fruits was couple of months deeply frozen. Halves of fresh fruits looks nicer to me and have nicer, greeny, color.
[img=http://img388.imageshack.us/img388/8795/p1170060wij6.th.jpg]

4. Seeds and juice from one fruit
[img=http://img142.imageshack.us/img142/5523/p1170069wgs2.th.jpg]

5. Seeds - closeup
[img=http://img142.imageshack.us/img142/3318/p1170086wsp1.th.jpg]

6. Fruit cut #2
Left Up on the photo is lemon, for color reference.
[img=http://img374.imageshack.us/img374/8832/p1170096wzq2.th.jpg]

7. Leafs on white background
Remark: Mother plant has no leafs now. Leafs are from my poted seedlings.
[img=http://img374.imageshack.us/img374/3702/p1170105wtg8.th.jpg]

8. Leafs on brown background
Remark: Mother plant has no leafs now. Leafs are from my poted seedlings.
[img=http://img174.imageshack.us/img174/1081/p1170106wbf8.th.jpg]

Ok, photographing ended, time is for lemonade

I've never heard of the term Siberian Lemon, probably a local appellation. As the tree in question is deciduous it must have a Poncirus parentage. Probably some type of Citrange. The looks of the seeds also shows a Poncirus parentage. Thank you for the pictures, very interesting. - Millet

I've looked at the pictures closely, but still can't quite decide whether this is a Poncirus with unusually large, smooth fruit, or a citrange type hybrid.
The fact that it is completely deciduous suggests it is a Poncirus. All the citranges I have seen retain some leaves in winter. But the fruits are definitely large for a Poncirus, and the leaves are somewhat different from normal.
Mike.

Hello,
Mike, could you tell me if the second leaf can be " Frost" ?




1= carrizo citrange
2= poncirus
3= poncirus

The leaf shape of the second specimen is just like the leaves on my 'Frost' seedlings.
However, as I tried to explain before, 'Frost' is simply a selected Poncirus plant at Riverside, California, from which I was sent seeds.
I don't actually know if my seedlings are identical to the parent Frost.
It is also perfectly possible that this leaf shape is a reasonably common variation and that many other Poncirus plants around the world have these leaves.
To be absolutely botanically correct (unless someone has proved Frost always comes true from seed), only plants propagated from cuttings or budwood of the Riverside plant can be called 'Frost'.

Do you know the origin of your Poncirus with these leaves?

Mike.

Hi all,
Mother plant had 2nd bloom in August.
Does regular Poncirus has the second bloom?
--ivica