I find some information about marmaladequat. But i don't know what is the difference between sunquat and marmaladequat?

Sunquat and Marmaladequat are among the more promising hybrids of the last decade, they are chance seedling between a meiwa kumquat and either a Meyer lemon or a Clementine mandarin. (The seedlings were discovered underneath a Clementine tree). The Marmaladequat is named for the ease in which marmalade is made from the fruit, having a peeling so soft that it doesn't need to be precooked. Both are thorny, upright trees and produce yellow fruit with a sweet juice and are completely edible, peel and all. Marmaladequat is reportedly more vigorous and comes back quickly from the roots if a freeze kill it to the ground. Both are probably hardy to 15F

Flavor: Sweet kumquat, no off-flavors, good quality.
Uses: Dessert, preserve.

Information taken from "Hardy Citrus For The Southeast" by Tom McClendon

Millet

Thank you a lot, Millet! I read that book. I'm looking for more information. But it is enough for me.

Marmalaidequat and sunquat are different seedlings of the same unknown cross found under a clementine tree.

I got the seed for my mature marmalaidequat from the original finder, Stewart Nagle. IMHO sunquat and marmalaidequat are the same.

IMHO neither are worth growing. They make a satsuma sized kumquat like fruit with a mild flavor. Who wants to eat a kumquat that size? Not me, I topworked mine to changshou kumquat, a much better tasting fruit.

I did not realize that the Sunquat and the Marmalade tree were the same tree. However, I agree with Mr. Texas. i once had a Sunquat tree that produced the little yellow fruits. As with Mr. Texas, I also thought the fruit of the Sunquat was not worth the effort and time it took to properly grow the tree, so I got rid of the tree. Millet

But how is about sweet juice? Is it worth drinking?

The Sunquat that I had, I don't remember the juice being sweet.- Millet

Serj, yes your correct, that is what Tom's book says, but I don't remember the fruit being sweet. However, I guess taste, like most all other traits is very subjective from person to person. In any case, just about every citrus variety that Tom McClendon deals with, are the cold hardy citrus varieties, and in comparison with taste of most of the other cold hardy citrus, Sunquat's juice might seem sweeter in Tom's opinion then juice of most. In my opinion, and the opinion of a great many people, its a real stretch to call the taste of such varieties eatable - but each to their own. - Millet

I would love to get both ...

I only heard about Sunquat so far, and only in US nurseries.

I like to cut nice fruits in slices with rind and all and eat them that way and making marmelade too.

I also never heard about the Changshou kumquat.

Changshou kumquat is well known as kumquat obovata in Ukraine.

Ah !

Of course I know Citrus (fortunella) obovata.

Thanx for telling me.

You will find many citrus in Europe are the same fruit we have here in the States with a different name.

Yes, but a chinese name for a japanese breeding in USA ...

Very confusing ...