闭鞘姜（Ｃｏｓｔｕｓ　ｓｐｅｃｉｏｓｕｓ），又称白石笋、樟柳头、水蕉花、广东商陆等，海南地区俗称雷公笋。为海南山区黎族著名的食用野菜，其嫩茎用于腌制酸笋或鲜食，十分味美开胃。现被海南地区人们普遍接受，市场需求量不断扩大，也逐渐有少量销往省外各地。除食用外 Costus speciosus, also known as white stalagmite, Zhang Liutou, water plantain, such as Guangdong penguin, Hainan Province, commonly known as Thunder Gongsun. Li Shan, Hainan famous edible wild herbs, the tender stems for pickled or fresh food, very delicious appetizer. Is now widely accepted by people in Hainan, the market demand continues to expand, but also gradually a small amount sold all over the province. In addition to food outside