Hoyt Arboretum, Portland, Oregon, USA

Common name: Trifoliate Orange, Trifoliate Orange, 枳 zhi

Family: Rutaceae

Synonym: Poncirus trifoliata

Distribution: CHINA: Anhui, Chongqing, S Gansu, N Guangdong, N Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, NW Jiangxi, S Shaanxi, Shandong, S Shanxi, Zhejiang.

Hardiness: Zone 5b -15 to -10 F

Life form: Deciduous shrub

Usage: medicinal, oils

Comments: A classic hedgerow plant that is virtually impenetrable due to its formidable thorns. Makes an excellent hedge, particularly for remote or uncommonly frequented areas of the landscape. Also an effective accent or specimen in the sense of being an interesting and unusual plant.
Immature fruit, mature fruit or peel are used medicinally.