sour orange plant MANSFELD:7658 Citrus aurantium L. subsp. aurantium PLANTS:CIAU8 Citrus ×aurantium L. ssp. aurantium PLANTS:CIAUA Bitter orange, Seville orange, sour orange, bigarade orange, or marmalade orange refers to a citrus tree (*Citrus × aurantium*) and its fruit. Many varieties of bitter orange are used for their essential oil, and are found in perfume, used as a flavoring or as a solvent. The Seville orange variety is used in the production of marmalade. [https://en.wikipedia.org/wiki/Bitter_orange] Citrus aurantium L. Citrus ×aurantium L. (pro sp.) bigarade bitter orange citrus aurantium citrus aurantium var. aurantium citrus vulgaris seville orange orange plant plant used for dietary supplements requires discussion