So I did a Google search and came up with several things beginning with the letter "u". One I'd actually heard about before but had forgotten, the ugli fruit. My daughter had picked one up at a Whole Foods market and shared it with me some years ago. I'm surprised I forgot about it. It really is an ugly little fruit, but it tastes good.
|Inside of Ugli Fruit|
The light green surface blemishes on the ugli fruit turn orange when it is at its peak ripeness. The flesh is very juicy and tends towards the sweet side of the tangerine rather than the bitter side of its grapefruit lineage, with a fragrant rind. The taste is often described as more sour than an orange and less bitter than a tangerine. The fruit is seasonal from December to April. It is distributed in the United States and Europe between November and April, and sometimes is available from July to September.
I found images and more information about the ugli fruit on this website.
Have you ever eaten an ugli fruit?