According to the book On Food and Cooking by Harold McGee, lesser-known citrus fruits that are worth knowing about include the following...
- "Kumquats, species of the genus Fortunella, are bite-size fruits that are eaten whole, thin rind and all. They are generally tart but not bitter. The calamondin or calamansi, also a diminutive citrus, is probably derived in part from the kumquat."
How I wish I could say I had Fortunella to eat today!