A small tree(Citrus aurantium subsp. bergamia) commercially grown chiefly in southern Italy for its sour citrus fruits,the rinds of which yield an aromatic oil.

• 佛手柑，香柠檬一种小树（酸橙亚种贝加毛橙），主要在意大利南部进行商业性种植。获取酸柠檬果实，外皮可产生一种芳香油。