Citrus I.D. needed (forum)

AM1324 starts with ...
The tree was planted by the last owners and they themselves said they didn't know what type of citrus this was. Last year was the first year that the tree actually produced fruit (after 8 years of living at the house) but I was on holiday and came home to a 3 or 4 rotten ones lying on the floor so couldn't identify them. This year the benches are full of fruit but I have no idea what kind of fruit they are. Any help would be greatly appreciated.
Pictures - Click to enlarge

Picture: 1
Picture: 2
Picture: 3
Picture: 4

Time: 8th February 2020 8:34pm

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jakfruit etiquette says...
If you look carefully it has 3leaves on every petiole, ie trifoliate leaves. Its not a Poncirus trifoliata, so that makes it a citrange or citrumelo. Thats a citrus hybrid, usually used as rootstocks but also grown in very cold climates. Most likely its a grafted tree, and the graft died, or has been taken over.
The thick rind on the fruit could indicate grapefruit pummelo ancestry, which makes it a citrumelo. We have a swingle citrumelo, the fruit is like a grapefruit lemon with slight pineapple scent, not everyone likes it.
Can you keep us updated when the fruit ripen ?


Time: 9th February 2020 9:01am

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Fruitylicious1 says...
Hi AM

Same response to your similar post.

Time: 9th February 2020 3:57pm

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johnnyv says...
Looks like trifoliate orange.

Time: 10th February 2020 7:23am

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Manfred says...
I'm with Jakfruit on this one. It does not look like Poncirus trifoliata (AKA trifoliate orange, bitter orange, flying dragon, or more usually just trifoliata) to me. It also does not look all that thorny in the pictures. The fruit does not look like any type of lemon, least of all a commercial variety like Lisbon.

Some sort of pommelo? Almost certainly, though apparently a very small fruited one as far as I can tell from the pictures.

How thorny is it? P.trifoliata is always very thorny - long nasty thorns all over, with zig-zag mature wood and a slightly frilled margin on the ends of new leaves. How bitter was the fruit? Trifoliata fruit is inedible.

All citruses are thorny and seedy when they are young but yours does not seem to meet the first criterion and overachieves wildly on the second. If it is not too bitter, persist as the seediness diminishes with age.

Time: 10th February 2020 5:48pm

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jakfruit etiquette says...
If you look at this pic, every leaf has 3 leaflets
https://plant.daleysfruit.com.au/l/citrus-id-needed3-17634.jpeg
That would make it a Poncirus hybrid, because it looks more like a Citrus than a Poncirus trifoliata.
Also Poncirus is deciduous, so it would have lost all its leaves over winter, if it was Poncirus.
https://www.google.com.au/search?q=poncirus+trifoliata&sxsrf=ACYBGNQ-u07SRMvo7nDgaskkkOJs3pnmEQ:1581373757386&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjfoMOohMjnAhWDXSsKHdyyAZoQ_AUoAXoECBMQAw&biw=1680&bih=893


Time: 11th February 2020 9:33am

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Original Post was last edited: 11th February 2020 6:25pm
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AM1324 says...
Thanks for all the help guys

Jackfruit Etiquette, thanks a lot this is really helpful and I will be sure to update everyone here once these little guys begin to ripen. And from your analysis of what it could be I’m really excited too.

Manfred, I chose the smallest fruit I could find that’s probably only been growing for less than a month. It’s not very thorny at all there thorns but nothing like a lemon tree also the thorns are very small. I haven’t eaten it yet but by giving it a lick I found it to be quite butter and left the tip of my tongue a little tingly so i thought it’d be best to wait to eat it when/if they ripen.

Another note I should add though is that a while back when I cut one of the fruits open, I discarded it in my compost pile and when I went back maybe a week later it had turned yellowish orange. i don’t know if this helps but i thought I should let all of you know.
Again massive a thank you to everyone helping me with this and will keep you updated.

Time: 11th February 2020 8:23pm

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jakfruit etiquette says...
Here is Swingle citrumelo, its a common rootstock in Australia.
https://citrusvariety.ucr.edu/citrus/swingle_citrumelo.html
When its grown from seed to produce rootstocks, and this grows into an ungrafted tree tree, they can be slightly variable.
There are other Citrumelos, but this is the most likely.
I had the funny experience years ago of getting some really unusual Citrus fruit from a PNG Lady at Rusty Market in Cairns. She used to sell unusual stuff, so I thought Id had the jackpot with a PNG Citrus. It turned out to be Swingle.

Time: 12th February 2020 11:42am

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