海菜，中药名。为水鳖科植物海菜花Otteliaacuminata（Gagnep.）Dandy.的全草。具有清热、止咳、利水、消肿的功效。主治肺热咳嗽、淋证、小便不利、水肿。
Hai-cai, name of Chinese Medicinal Material. It refers to the whole plant of Ottelia acuminata (Gagnep.) Dandy, a plant of the water lily family. It has the functions of clearing heat, relieving cough, promoting diuresis, and reducing swelling. It is used to treat cough due to lung heat, stranguria, urinary difficulty, and edema.

功效作用 功能
Efficacy, function.

清热、止咳、利水、消肿。主治
Clearing heat, stopping cough, promoting diuresis, and reducing swelling. Used for treating...

肺热咳嗽、淋证、小便不利、水肿。用法用量
Symptoms: cough due to lung heat, gonorrhea, difficult urination, and edema. Dosage and administration.

内服：煎汤，20-30g。相关论述
Internal administration: Decoction, 20-30g. Relevant discussion.

《植物名实图考》：“水濒人摘其茎，煤食之。《蒙自县志》：茎头开花，无叶，长丈余，细如钗股。卷而束之，以鬻于市，曰海菜，可瀹而食。盖未见植根水底、漾叶波际也。《滇海虞衡志》以为其根即莼，则并不识莼。考《唐本草》有薢菜，叶似泽泻而小，形差相类。语即未详，图亦失真，不并入。”加工炮制 采收加工
"Plant Names and Realities Illustrated": "People living by the water pick its stems and eat them. In the 'Mengzi County Annals', it is described as having flowers at the top of the stem, without leaves, over a zhang long, and as thin as a hairpin. The stems are rolled and tied, then sold in the market as 'sea vegetables', which can be cooked and eaten. It is said that the plant has not been seen rooted in the water or with leaves floating on the waves. In the 'Dianhai Yuheng Zhi', it is believed that its roots are the same as water shield, showing a lack of understanding of water shield. Referring to the 'Tang Materia Medica', there is a plant called 'xie cai', with leaves resembling water plantain but smaller, showing some similarities. The description is not detailed, the illustration is inaccurate, and it is not included in the book." Processing and harvesting.

春、夏季采收，鲜用或晒干。植物学信息 植物种属
Harvest in spring or summer, use fresh or dry in the shade. Botanical information: Plant species.

水鳖科植物海菜花。形态特征
Sea holly, a plant in the Hydrocharitaceae family. Morphological characteristics.

海菜花，多年生沉水草本。茎短缩。叶基生；叶柄长短视水深浅而异，深水中叶柄长200-300cm，浅水中叶柄长4-20cm；叶形变化较大，线形、被针形、长椭圆形、卵形、狭卵形至心形，先端渐钝，基部心形，稍下延，全缘或有细锯齿。花单性，雌雄异株；佛焰苞无翅，有2-6条棱，无刺或有刺，雄株佛焰苞含40-50朵雄花，雌株佛焰苞内含2-3朵雌花，花在水面上开放，花后连同佛苞沉入水底；雄花，萼片3，绿色，花瓣3，白色，基部黄色或橙色，雄蕊9-12；雌花的花萼、花瓣与雄花相似，花柱3，橙黄色，子房三棱形。果实三棱状纺锤形，长8cm。种子多数，无毛。花、果期5一10月。分布区域
Hai Cai Hua is a perennial submerged aquatic herb. It has a short stem. The leaves are basal; the length of the leaf stalk varies depending on the depth of the water, with the stalk being 200-300cm long in deep water and 4-20cm long in shallow water. The leaf shapes vary greatly, from linear, needle-shaped, elongated oval, ovate, narrow ovate to heart-shaped, with a gradually blunt apex, heart-shaped base, slightly downward extension, and entire margins or fine serrations. The flowers are unisexual, with separate male and female plants; the spathe lacks wings, has 2-6 ridges, and may or may not have spines. The male plants' spathes contain 40-50 male flowers, while the female plants' spathes contain 2-3 female flowers. The flowers open on the water surface and, after flowering, sink to the bottom of the water along with the spathe. The male flowers have 3 green sepals, 3 white petals with a yellow or orange base, and 9-12 stamens; the female flowers' sepals and petals are similar to those of the male flowers, with 3 orange-yellow stigmas and a three-lobed ovary. The fruit is spindle-shaped and three-ridged, 8cm long. The seeds are numerous and hairless. The flowering and fruiting period is from May to October. Distribution area.

分布于广东、海南、广西、四川、贵州、云南等地。生长环境
Distributed in Guangdong, Hainan, Guangxi, Sichuan, Guizhou, Yunnan, and other regions. Growing environment.

生于湖泊、池泽。
Born in lakes and marshes.