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香芋(Apios americana L.),豆科,草本植物,茎蔓生,长数尺至1丈有余。食用部分为块根,圆球形或不规则形,外皮棕黄色,肉鱼洁白。与天南星科的普通芋头(Colocasia esculenta)是完全不同的。香芋是我国传统的蔬菜,又是珍贵的蔬菜,约有几百年栽培历史。明朝徐光启《农政全书》中即有形如土豆、味甘美的记载,清代《授时通考》中也有“形如土豆”、煮熟可食的介绍。可见,它早已为我们的祖先所利用。但香芋产量低,平均亩产7～8担,占地时期又长,一般需6～7个月。目前近郊大面积栽培几乎绝迹,但在江、浙沿海地区,尤其是长江下游沿海区域分布较多。上海市崇明县,虽然是零星栽培,分布面却甚广。
Taro (Apios americana L.), leguminous, herbaceous plants, stems and vine, a few feet long to more than 1 husband. Edible part of the root, spherical or irregular shape, skin brown, white fish. And Araceae common taro (Colocasia esculenta) is completely different. Taro is China’s traditional vegetables, but also precious vegetables, about hundreds of years of cultivation history. Ming Dynasty Guangguang “The Complete Works of Agriculture” that is tangible like potatoes, sweet and beautiful records, the Qing Dynasty “time pass” also has “shaped like potatoes”, cooked edible introduction. It can be seen that it has long been used by our ancestors. However, taro yield is low, the average yield of 7 to 8 Tam, covering a long period of time, usually 6 to 7 months. At present, large-scale cultivation in the suburbs is almost extinct, but there are more distributions in coastal areas of Jiangsu and Zhejiang, especially in the lower reaches of the Yangtze River. Chongming County, Shanghai, although sporadic cultivation, distribution is very wide.