The citrangequat (''Citrus'' × ''georgiana'') is a

citrus ''Citrus'' is a genus of flowering trees and shrubs in the family Rutaceae. Plants in the genus produce citrus fruits, including important crops such as oranges, mandarins, lemons, grapefruits, pomelos, and limes. ''Citrus'' is nativ ...

hybrid Hybrid may refer to: Science * Hybrid (biology), an offspring resulting from cross-breeding ** Hybrid grape, grape varieties produced by cross-breeding two ''Vitis'' species ** Hybridity, the property of a hybrid plant which is a union of two diff ...

of a

citrange The citrange (a portmanteau of ''citrus'' and ''orange'') is a citrus hybrid of the sweet orange and the trifoliate orange. The purpose of this cross was to attempt to create a cold hardy citrus tree (which is the nature of a trifoliate), wi ...

and a

kumquat Kumquats ( ), or cumquats in Australian English, are a group of small, angiosperm, fruit-bearing trees in the family Rutaceae. Their taxonomy is disputed. They were previously classified as forming the now-historical genus ''Fortunella'' or plac ...

, developed by

Walter Swingle Walter Tennyson Swingle (January 8, 1871 – January 19, 1952) was an American agricultural botanist who contributed greatly to the classification and taxonomy of citrus. Biography Swingle was born in Canaan, Pennsylvania, and moved with his ...

Eustis, Florida Eustis is a city in Lake County, Florida, United States. It lies about 35 miles northwest of Orlando, Florida and is part of the Greater Orlando, Orlando–Kissimmee–Sanford Metropolitan Statistical Area. The population in the city ...

, in 1909. Citrangequats are bitter in taste, but are considered edible by some at the peak of their maturity. Three named

cultivar A cultivar is a kind of Horticulture, cultivated plant that people have selected for desired phenotypic trait, traits and which retains those traits when Plant propagation, propagated. Methods used to propagate cultivars include division, root a ...

s 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 Telfair County is a county located in the southern portion of the U.S. state of Georgia. As of the 2020 census, the population was 12,477. The largest city and county seat is McRae-Helena. In 2009, researchers from the Fernbank Museum of N ...

*'Thomasville' – most common citrangequat; named for the city of

Thomasville, Georgia Thomasville is the county seat of Thomas County, Georgia, United States. The population was 18,881 in 2020. The city deems itself the "City of Roses" and holds an annual Rose Festival. The city features plantations open to the public, a histor ...

. 'Thomasville' is considered the most cold-hardy edible citrus variety. It can tolerate temperatures down to −15 °C (5 °F).Cold Hardy Citrus and Hybrids
''Limette'' (Newsletter Citrus Friends Europe) 8: 1–2.

References

Oranges (fruit) Citrus hybrids Food and drink introduced in 1909 Kumquats American inventions {{Fruit-stub