A plant genus of the family RUTACEAE. They bear the familiar citrus fruits including oranges, grapefruit, lemons, and limes. There are many hybrids which makes the nomenclature confusing.
    

concept

Pummelo or Pamplemousse (Citrus maxima (Burm.) Merr.): flowering and fruiting branch with numbered fruit segment and flower section. Chromolithograph by P. Depannemaeker, c. 1885, after B. Hoola van Nooten.

Citron (Citrus medica L.): flowering and fruiting stem. Coloured aquatint by G. Geri, c.1825, after D. Serantoni.

A thorny stem of Poncirus grafted to a woody stock. Watercolour.

Citron (Citrus medica): flowering branch. Colour and coloured mezzotint, c. 1741.

Cocoa tree (Theobroma cacao), Chinese citron or natsumikan (Citrus natsudaidai), jak fruit (Artocarpus heterophyllus), muhimbi tree (Cynometra cauliflora) and bilimbi tree (Averrhoa bilimbi), in separate plates. Line engraving after C. de Bruins, 1706.

Citrus : a history / Pierre Laszlo.

Aunty Brand / Alturas-Garfield Citrus Cooperative.

Citrus aurantium, linn. : the source of vitamin C in Ostomalt : "all the vitamins for growth and protection".

Quality of canned orange juice / by J.M. Boyd and G.T. Peterson.

To make a spotless orange : biological control in California / Richard C. Sawyer.

Citrus

Images

Catalogue

Citrus : a history / Pierre Laszlo.

Aunty Brand / Alturas-Garfield Citrus Cooperative.

Citrus aurantium, linn. : the source of vitamin C in Ostomalt : "all the vitamins for growth and protection".

Quality of canned orange juice / by J.M. Boyd and G.T. Peterson.

To make a spotless orange : biological control in California / Richard C. Sawyer.