Kumquats

Kumquats ( ), sometimes spelled cumquat in Australian English and British English, are a group of small, angiosperm, fruit-bearing trees in the family Rutaceae. The edible fruit closely resembles the orange (Citrus x sinensis) in color, texture, and anatomy, but is much smaller, being approximately the size of a large olive. They are native to southern China but have been cultivated for centuries in Japan and Southeast Asia. The kumquat is a fairly cold-hardy citrus.

Calamansi ('''Citrus × microcarpa), also known as calamondin, Philippine lime, or Philippine lemon''', is a citrus hybrid cultivated predominantly in the Philippines. It is native to the Philippines, parts of Indonesia (Borneo, Sumatra, and Sulawesi), Malaysia, and Brunei, as well as Taiwan, and parts of southern China.

The limequat ('''Citrus × floridana''') is a citrus hybrid that is the result of a cross between the Key lime and the kumquat, hybridized by Walter Tennyson Swingle in 1909.

The citrangequat ('''Citrus × georgiana''') is a citrus hybrid of a citrange and a kumquat, developed by Walter Swingle at Eustis, Florida, in 1909. Citrangequats are bitter in taste, but are considered edible by some at the peak of their maturity. Three named cultivars exist: 'Sinton' – Nagami kumquat (Fortunella margarita) x Rusk citrange; named for the city of Sinton, Texas 'Telfair' – Nagami kumquat x Willits citrange; named for Telfair County, Georgia 'Thomasville' – most common citrangequat; named for the city of Thomasville, Georgia. 'Thomasville' is considered the most cold-hardy edibl

thumb|Citrofortunella varieties (left to right): Jiangsu kumquat, calamansi, limequat, mandarinquat Citrofortunella are a large group of commercial hybrids that cross the kumquat with other citrus. In the system of citrus taxonomy established by Swingle, kumquats were placed in a different genus, Fortunella, from Citrus, which included citron, mandarin orange, pomelo and papedas. The result of genetic crosses between kumquats and these other citrus would then be intergeneric hybrids, so a novel genus name was coined for them in 1975, by compounding the names of the contributing genera to form

The mandarinquat, also misleadingly called orangequat, is any cross between a mandarin and a kumquat (Citrus crassifolia). Mandarinquats are members of the citrofortunella group.