Cattail (cattail) is a perennial deciduous, rooted monocotyledonous plant. Also known as cattail, cattail, cattail. It is also known as water candle because of its candle-like spikes. Stems are extremely short and inconspicuous. Walking stems are developed, not divergent or occasionally divergent, not hypertrophied, the outer skin is almost pale yellowish brown, and the front end can continuously differentiate into indeterminate shoots. Prefer warm, well-lit environment, born in ponds, riverbanks, canals, wet and watery places. It is one of the most important aquatic economic plants, and its green leaves and spikes can be used to decorate garden ponds, as well as raw materials for papermaking, shoots and vegetables. In addition, its pollen can also be used as medicine.