Kumquats are in the citrus family, though not in the Citrus genus which includes lemons, limes, oranges and grapefruit.
Kumquats look like miniature oranges with the size similar to a small cherry tomato.
The flavor is a tart-sweet. Store kumquats in the refrigerator for up to two weeks. Due to their thin skin, they won't store as long as oranges. Make sure to wash the fruit prior to eating. For use in jams and jellies, it may be necessary to remove the kumquat's seeds.