The shangjuan, or Ichang lemon (''Citrus'' × ''wilsonii'') is a cold-hardy citrus

fruit In botany, a fruit is the seed-bearing structure in flowering plants (angiosperms) that is formed from the ovary after flowering. Fruits are the means by which angiosperms disseminate their seeds. Edible fruits in particular have long propaga ...

and plant originating in

East Asia East Asia is a geocultural region of Asia. It includes China, Japan, Mongolia, North Korea, South Korea, and Taiwan, plus two special administrative regions of China, Hong Kong and Macau. The economies of Economy of China, China, Economy of Ja ...

. It is a hybrid between '' Citrus cavaleriei'' and '' Citrus maxima''.

References

Citrus Citrus hybrids Fruits originating in East Asia {{fruit-stub