Kelp is a large marine brown algae plant growing in low-temperature seawater, which belongs to marine algae plants and can be used for cooking methods such as mixing, burning, stewing and stewing. Kelp, brown algae, Laminariaceae. The sporophyte is large, brown, flat, ringed, up to 20 m long, divided into leaves, stalks and fixators, which are in the form of pseudoroots. The leaf is composed of epidermis, cortex and marrow, and there are sporangia in the lower part of the leaf. It has a mucus cavity, which can secrete slippery substances. A tree-like branch of a fixture used to fix rocks to the seabed. Growing in seawater with low water temperature. It is widely planted in the northern coastal areas of China and the coastal areas of Zhejiang and Fujian, and its output ranks first in the world. Rich in fucoidan and iodine, it can be used to eat and extract iodine, fucoidan, mannitol and other industrial raw materials. Its leaflike body can be used as medicine.

Algae grow in the inner bay with calm wind and waves, the tidal flat or stone marsh in the middle intertidal zone. Or on the muddy beach in the calm inner bay. China's coastal areas are all distributed, and Zhejiang and Fujian coastal areas grow more. It has soft and hard loose knots; Resolving phlegm and resolving stagnation; Detoxification and swelling reduction. Indications for swelling and pain; Laplace operator; Carbuncle swelling; Furuncle; Food accumulation; Insect accumulation; Abdominal distension and tightness; A nosebleed.