Kumquat, << KUHM kwaht, >> is a citrus fruit that resembles a small, oblong orange. The fruit is only about 1 to 2 inches (2.5 to 5 centimeters) long. The kumquat tree is a dwarf evergreen about 10 feet (3 meters) high, but many reach 15 feet (5 meters). It stands frost better than an orange tree. The kumquat is native to China and is widely cultivated in Japan. California, Florida, and the Gulf Coast also raise this fruit. Kumquats are frequently eaten whole, or are candied and made into preserves, marmalade, and jelly.