The Tropical Fruit Forum

Mangosteen and G.xanthochymus doesn't sound like a match made in heaven to me.

True that much thinner and longer pedicel is typical of chempas and that the presence/absence of a collar is another difference between jacks and chempas. I think I would be leaning toward a chempajack for the pictured fruit than a pure chempa. Chempajacks often have the flesh more like a chempa, low on latex but no collar and skin more like a jack but its more complicated than that.

I might venture an opinion. Many of the ones we assume to be pure chempas have a bit of jack in the family tree. The skin is sometimes just like a jack and there is a lot a variation in just how hairy the new growth is and how big the fruit are, and even how sweet or savoury or how yellowish fruit are.

Intergeneric crosses are far more likely when they are more closely related.

The 3 mentioned species are very similar and each species has fruit variable in size and brasiliensis is the least likely to have the terminal beak. Gardneriana is often a bit larger and more orange when ripe.

I am really a bit hot and rainy for them so they are shy bearers in my climate. Florida should be good.

Still can't see anything looking remotely like a cross. Lychees go brown when they dry out. Longans don't have the scale like sections.

Zone maps that rely on lowest average minimums are pretty clumsy in determining where plants will actually grow as its one dimension without other frequency thresholds, humidity and other measures. The Australian and Canadian systems use different zone numbers but at least have around 5c gradations. Interestingly Sydney across the urban areas is in 3 zones at the same time.
If the zone system could somehow integrate into the Koppen climate system it might be more useful.

It is usually the rootstock but soursop, sugar apple, atemoya and cherimoya should work.

I remember that taste and haven't had a bad one in years. Its called nasturtium and kinda reminds me of turps in mangoes. Poorer yellow lines grown in cold climate are the most prone. Long reds,solos and black petiole types never seem to have much of it.

Such a contrast to here so far as rain goes. My place has had 26 rainy weekends in a row.

If your soil is acid lime is good with a bit of dolomite for magnesium.

Ok Zapalla does have the durian chempas which are really good an rough skinned and their orange fleshed flaming one I have tried and its almost as good. It has larger bulbs than the leopard skin which is more savoury and perhaps not as good. Remembering Malaysia has over 40 registered varieties and no doubt over 20 would be very good. While maybe 15 varieties have been brought to this corner of the fruit world, FNQ did inherit some of the best. I know Trina/Peter has at least 3 really good ones including what I call honey. Peter had a great type with its first fruit at Feast of the Senses in Innisfail in March that was like a big CH35. Alan Carle has a very good small type with small bulbs much like honey variety and he also has a big twisted tree. There are others but in this region if I was to rank them according to my reckoning it might not be the same as what other people thing.If held at gun point and forced to rate them I would say twisted and the new one of Peter Sallaras are on par with durian, zapalla orange and the honey style (small bullet shaped dull yellowish when ripe) just behind them. There are some big guns in Malaysia we could use.

I didn't mention some important differences in the use between chempas and jacks. The seeds of both are good as the starch element in stews and curries and can be boiled and eaten like chestnuts btw. Like chempadak flesh is often fried and eaten pan cooked. Jacks that are cooked are green and often used as a meat substitute in dishes.