Food. According to data from official website, betel nut is listed as 29 kinds of food commodities in China. Areca catechu is an evergreen tree of Magnoliaceae, Primordata, Palmae and Areca, with an erect stem and tree shape, with an altitude of10m and a height of 30m, with obvious leaf scars, monoecious, multi-branched inflorescences, oblong ovary, oblong or ovoid fruit and ovoid seeds, and a flowering period of March-April.