野生芹菜,因生长在水沟、河边和低洼潮湿的环境,又名水芹。在江南各省分布最广,北方各地也有生长。它是多年生湿性草本植物,属伞形科,茎细长,中空,具匍匐性,各节间均能生根形成新株。二回羽状复叶,互生,叶柄细长,叶缘锯齿状。叶背面有光泽。根为须根,有二级侧根。入泥入水均为白色。须根簇生,根群纤细,互相交织在一起,呈海绵状。夏季开小白花、结小干果,多以茎行无性繁殖。水芹能分泌多量的挥发油、水芹素和多种维生素及矿物质,并有特殊的香味。据有关资料介绍,每100克水芹内含有蛋白质2.1克,脂肪0.6克,钙154毫克,磷9.8毫克,铁23.3毫克,维生素B_1 0.02毫克,维生素B_2 Wild celery, due to the growth in ditches, riverside and low-lying damp environment, also known as cress. The most widely distributed in the provinces of southern Yangtze River, but also throughout the growth of the north. It is a perennial wet herb, is a Umbelliferae, stems slender, hollow, with creeping, internodes can take root to form a new strain. Two back feather compound leaves, alternate, petiole slender, leaf serrated edge. Leaf back shiny. The root is fibrous, with two lateral roots. Into the mud into the water are white. The fibrous roots, fine roots, intertwined with each other, was sponge-like. Summer bloom white flowers, knot small dried fruit, and more to stem asexual reproduction. Cress can secrete a large amount of volatile oil, water and a variety of vitamins vitamins and minerals, and have a special flavor. According to the information introduced, each 100 grams of cress contains 2.1 grams of protein, fat 0.6 grams, calcium 154 mg, phosphorus 9.8 mg, iron 23.3 mg, vitamin B_1 0.02 mg, vitamin B_2