Joined: 24 Nov 2005 Posts: 589 Location: UK - 15 miles west of London
Posted: Sun 24 Apr, 2011 12:02 pm
Fukushu is a type of kumquat, not a hybrid.
I believe the only named variety of orangequat is called "Nippon". It was bred in the USA in the 1930's.
Your fruit look to me like Nippon orangequat.