Bupleurum stenophyllum

Bupleurum stenophyllum is a species of Bupleurum native to Japan, Korea, and mainland China;^[1][2][3] it is also introduced to Taiwan.^[4] Its root is used as a traditional medicine in East Asia known as Radix Bupleuri (柴胡).

Bupleurum stenophyllum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Apiales
Family:	Apiaceae
Genus:	Bupleurum
Species:	B. stenophyllum
Binomial name
Bupleurum stenophyllum (Nakai) Kitag.

Some sources treat Bupleurum falcatum as a species complex incorporating many East Asian species such as Bupleurum stenophyllum, Bupleurum scorzonerifolium, and Bupleurum chinense.^[5] However, molecular studies indicate that these are all separate species.^[2][3]

Varieties

• Bupleurum stenophyllum var. stenophyllum (2n = 26): Japan, Korea, Northeast China.^[1][6]
• Bupleurum stenophyllum var. kiusianum Kitag. (2n = 20): Japan (Kyushu and Yamaguchi), Korea, and Northeast China.^[1][2][6]
• Bupleurum stenophyllum var. leiocarpum X.J.He & C.B.Wang (2n = 26): Southwest China (Sichuan).^[3]
• Bupleurum stenophyllum var. obvallatum (Nakai) Kitag.: Japan (Iki).