Kumquat, also known as kumquat, is an evergreen shrub of the genus Kumquat in the family Rutaceae. Trees within 3 meters in height, with thick leaves, ovate lanceolate or oblong in shape, slightly pointed or blunt at the top, and wide wedge-shaped or nearly round at the base; The petiole is 1.2 centimeters long, and the wing leaves are very narrow. Single flower or 2-3 flower clusters; The flower stem is 3-5 millimeters long; The ovary is elliptical, the style is slender, usually 1.5 times the length of the ovary, and the stigma is slightly enlarged. Oval or oval shaped fruit, ranging from orange yellow to orange red in color, with a sweet taste on the skin; The seed is oval in shape, with green cotyledons and embryos, and a single embryo or occasional multiple embryos. The flowering period is from March to May, and the fruiting period is from October to December.