Tengchong Beihai Wetland is not only the only wetland of volcanic barrier lake on plateau in southwest China, but also the natural distribution area of the national first-class protected plant-brasenia schreberi and the coarse lysimachia distributed in Beihai narrow area. Tengchong Beihai Wetland is a protected area of biological species and natural historical sites, and also an important research base of geography, geology and biology. A total of 159 species of wetland vascular plants were collected, which belong to 52 families and 122 genera, including 130 species of hygrophyte, such as the national first-class protected plant of brasenia schreberi, and national second-class protected plants of wild water chestnut, ribbon grass, habenaria dentata, fagopyrum cymosum, ottelia acuminata and so on.

Among them, the following key plant  are introduced:

Brasenia schreberi:

included in the National first-class key protected wildlife plants (approved by the State Council on August 4, 1999).

Iris:

It is the most unique plant in wetland and usually blooms in spring but blooms most brightly in mid-to-late April, just like large patches of purple clouds spreading on the meadow.

Habenaria dentata:

Its root can be used as medicine. It has the effect of diuresis, antiphlogistic and detoxification; included in Convention on International Trade in Endangered Species of Wild Fauna and Flora.

Kingcup:

It blooms from August to November and is also one of the most dazzling colors in autumn in wetland, which is also called henna because of its ability to make nail polish.

Coarse lysimachia:

It is grown in the southwest of Yunnan Province; the type specimen is picked from Tengchong Beihai Wetland; its property and flavor are spicy, astringent and insipid. It has the effect of activating blood and regulating menstruation for oral administration.

Ribbon grass:

It is called Chinese ladiestresses root or herb by the local people , with about 13-30 cm high and long flowering period; it can be used as medicine, with the effect of supplementing qi and promoting the production of body fluid as well as cooling blood and nourishing yin; included in the Convention on International Trade in Endangered Species of Wild Fauna and Flora.