Azolla imbricate (Azolla imbricate) belongs to the class Azolla and belongs to Azolla family. The plant is triangular in shape, floating on the water, with short and slender horizontal stems and pinnate branches, with roots growing underneath and small leaves growing above. The leaves are extremely small, scale-like, alternate, and arranged in two imbricate rows on the stem. Each leaf is split into two overlapping lobes. The upper lobe is reddish brown or green and performs photosynthesis. Nitrogen-fixing cyanobacteria (Anabaena) often grow in it; the lower lobe is submerged in the water, membranous, and covered with Sporangia fruit. The growing season is short and reproduction is rapid. Widely distributed in all provinces and regions south of the Yangtze River in China. They mostly live in small pools of clean water. It is an excellent source of biological fertilizer and can play a good role in increasing rice production when cultivated in rice fields. It can also be used as fish bait.