1, Polygonum hydropiper, an annual herb, 20 ~ 80 cm high, upright or prostrate. The stem is reddish purple, hairless, the nodes are often enlarged and have fibrous roots. It is a Polygonum plant of Polygonaceae, also known as Polygonum hydropiper, which grows in wetlands, waterside or water.

2. Ipomoea aquatica, a native of East Asia, has been widely cultivated as a vegetable, or sometimes escaped into the wild. It is commonly cultivated in Fujian, Guangxi, Guizhou, Sichuan, Fujian, Jiangsu, Sichuan, Guangdong and other provinces in central and southern China, but less in the north.

3. Lotus, a perennial emergent herb, mainly grows in shallow waters such as lakes and floodplains, with rich colors, mainly including red, pink, white, green, yellow, etc. The flower patterns mainly include single petals, multiple petals, double petals and thousand petals.

4. Taxodium ascendens likes deep, loose and moist acidic soil. Strong moisture resistance, long-term and normal growth in water, pool shirt is a light-abandoned tree species, not shade-tolerant.

5. Sagittarius, a perennial herb of Alismataceae, was born in paddy fields with leaves like arrows and white flowers. There are bulbs underground, yellow or bluish white, which are eaten as vegetables.

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