I would rip up a leaf and smell it. That will give you an idea of category.

Thanks. I wasn't sure how leaf size goes along with citrus categories
(or if growing inside a wall of plumbago makes leaves grow larger than
normal). I don't think I can pot it up without killing it but I can at
least carve out more space for it.

I smelled it. I wasn't able to really distinguish it from other citrus--I'll try again when it warms up.

I don't know trees very well and can't tell if it's grafted. Is it obvious here?

This is approximately zone 10, if it matters.

It is not readily apparent to me whether you have a grafted tree, or, if you have a grafted tree, whether the actual graft died out and rootstock has taken over.

Yes, citrus leaves increase in size in shade vs. sun.

Thanks! I'll see if I can make it happy enough to produce something useful. :)

Update, just in case a slightly over-the-hill flower helps at all. I am impatient!

:)

The tree has been liberated from the weeds for a while now and filled out quite a bit. The new leaves are still large, but a little less so than when they were shaded. The flowers are large (compared to a "Pixie" tangerine) with pollen. The bee hiding in the photo is about 50% larger than a European honey bee if that helps. The color on this tree is really good in person--the lighting was bad for the photos.

The leaves don't smell quite like my lemon tree or my navel orange. Random guesses are welcome, and if I ever get any fruit out of it, I will report back who was closest!

Can you post a picture showing the flower straight on? I noticed the colors of the pistils, anthers and stigmatic fluid are different according to the variety.

Kinda looks like cuban shaddock to me. Rootstock.

Thanks!

I wasn't able to get a decent photo of the flowers but will give it a try tomorrow.

I'll keep Cuban shaddock in mind if it fruits. If it's rootstock--totally possible--I guess it took over a long time ago as there is just one nice fat trunk and nothing else.

I have some fruit. It's not ripe yet. It is very smooth and very round and doesn't look like the Cuban shaddock but perhaps another pomelo type. Are there other rootstocks with Big Round Fruit?

I'll report back if it gets ripe. For now:

It is not a grapefruit, as the leaf petiole is wrong for grapefruit. Could be a pmmelo .

https://www.google.com/search?client=firefox-b-1-d&q=%E2%80%A2+Lemon+trees+have+elliptical+leaves+with+fine-tooth+edges%2C+dark+green+on+top+and+light+green+on+the+bottom%2C+and+the+leaves+grow+close+together.+

From the size of the flower and the texture of the fruit (although still unripe), I would say it is in the grapefruit or pomelo family.

But the leaf does not appear to have a winged petiole, so that should very much narrow the possibilities down, since most grapefruit and pomelo varieties have a winged petiole.

I agree that it might be a Cuban shaddock rootstock that has overgrown the scion. You'll want to try to see if you can identify a graft line.

There are actually some other possibilities, but I do not mention them because they are rarer varieties and so statistically it is not likely to be that.

Sometimes scratching the rind gives you an idea what it is. Certainly for grapefruit and pommelo.

Rind smells...sorta like a green orange.

I can't identify a graft line but I don't have a good eye for that.

It's most likely a rootstock but anything is possible based on other things the previous owners have planted. :)

Anyone know about when Cuban shaddock should be ripe?

Thanks!