For the longest time I had no clue what one even was, but just like in an expanding buisness we must journey past the knowns of the "fruit section" Sure we could have an apple (twitter) or the easy banana that looks green but by the time you bring it home it has turned brown and the only thing you can use it for is banana bread (facebook). But go beyond. To another section even! Maybe you have to go to another store compleetly, a specialty store. You might, and proabally will have to spen even more for it. But alas you will fin your kumquat as well. I hope this helped.