Citrus x lumia - syn.Citrus x limon 'Lumia'; Citrus limon var. lumia Swingle; Citrus medica L. var. lumia - Rutaceae
露蜜 Lu mi (chin.), pear lemon, Lumie, Patriarch-Zitrone
„The Pear lemon (Citrus × limon 'Lumia') is often confused with the 'Palestine Sweet Lime' Citrus × jambhiri Lush. 'Palestine' or other sweet limes. Also called French lime and (erroneously) Sweet lemon it is a tree found in Mediterranean countries. The fruit resembles a pear in shape, has a thick peel and is not very juicy. It can grow to a formidable size; the fruit in the picture is 18 cm (7 in) long as the ruler shows. A group of scientists working in the University of Catania, Italy has shown by studying its chromosomes that the Pear lemon (and its cousin Adam's apple below) was first a hybrid of pomelo and citron, which then hybridized with lemon. Pear lemon is sometimes classified as a citron hybrid.
Cultivated varieties: Bornéo (Indonesia), Balaingue, Bitrouni and Otrodj (Iran)“
The peel oil of the Borneo cultivar consists mainly of limonene (38%), linalyl acetate (31%), and linalool (25%). The peel oil of the Poire de Commandeur cultivar has limonene 95%.
The leaf oil of Borneo cultivar is dominated by linalool (47%), with linalyl acetate (16%), α-terpineol (8%), geraniol (5%), and geranyl acetate (4%). The leaf oil of the Poire de Commenadeur cultivar is dominated by β-pinene (41%) and (E)-β-ocimene (15%).
[Volatile components of peel and leaf oils of lemon and lime species. Lota, M. L., de Rocca Serra, D., Tomi, F., Jacquemond, C., Casanova, J., Journal of Agricultural and Food Chemistry, Vol.50(4), 2002, 796-805] http://188.8.131.52/IMG/pdf/2002_JAFC_CitronsLimes.pdf