citrus japonica (kumquat)

Kumquats (or cumquats in Australian English, ; Citrus japonica) are a group of small fruit-bearing trees in the flowering plant family Rutaceae. They were previously classified as forming the now-historical genus Fortunella, or placed within Citrus sensu lato.

The edible fruit closely resembles the orange (Citrus sinensis) in color and shape but is much smaller, being approximately the size of a large olive. Kumquat is a fairly cold-hardy citrus.

The English name 'kumquat' derives from the Cantonese ...