油柑子，葉下珠科葉下珠屬，分佈於印度、斯里蘭卡、印度尼西亞、馬來西亞、菲律賓、南美、臺灣、香港、江西、福建、廣東、海南、廣西、四川、貴州、雲南以及中南半島等埞，生長於海拔200米到2300嘅地區，喺山地疏林、灌木叢、荒地或者山溝啲向陽處多見，亦都有人工種植。果生食得，味酸、微苦而甘香，食用後先苦後甘，口有餘甘味，生津止渴。乾葉做得枕頭芯。又藥用得。
Oil mandarin, subphyllous pearl family, distributed in India, Sri Lanka, Indonesia, Malaysia, the Philippines, South America, Taiwan, Hong Kong, Jiangxi, Fujian, Guangdong, Hainan, Guangxi, Sichuan, Guizhou, Yunnan and Indochina Peninsula, growing at an altitude of 200 meters to 2300 meters, in mountain sparse forests, shrubs, wastelands or ravines to the sun, there are also artificial planting. The fruit is eaten raw, the taste is sour, slightly bitter and sweet, and it is bitter and sweet after eating, and the mouth has a sweet taste, and it quenches thirst. Dried leaves can dry the pillow core. It is also medicinal.