最近在市场上发现有许多假桂圆出售，它们是无患子科龙荔的果实，野生面有毒，生食易致人癫痫，故又名“疯入果”。识别方法如下。1．外观：桂圆呈圆球形或椭圆形，表面光滑，黄粉稀薄而均匀，用水洗去黄粉可见表面为黄褐色略粗糙；无荔枝样网状纹理，且有果蒂（有时果蒂可能被 Recently found in the market there are many fake dried longan sale, they are Sapindus citronella fruit, wild noodles toxic, raw food easy to cause human epilepsy, it is also known as “mad into the fruit.” The identification method is as follows. 1. Appearance: Longan spherical or oval, smooth surface, thin and uniform yellow powder, yellowish brown washed with water to see the surface is slightly rough; litchi-like reticular texture, and there are fruit pedicle (sometimes the pedicle may be