
Ottelia acuminata, an edible aquatic plant endemic to southwest China, is in full bloom on Lugu Lake in Yunnan province. [Photo by Luo Hua/for chinadaily.com.cn]
Lugu Lake in Lijiang, Yunnan province, became even more beautiful and charming recently as a large number of Ottelia acuminata, an edible aquatic plant, reached full bloom on the water's surface.
Many tourists can be seen arriving every day at the lake in the ancient city of Lijiang to enjoy the flowers rippling with the waves.
Ottelia acuminata, a water species endemic to southwest China, is usually in full bloom on Lugu Lake between May and October, attracting a large number of tourists from home and abroad.
It requires harsh growth conditions, but the water must be clear. Growth will be affected even if the water is only lightly polluted, or if fertilizer has run into the lake from farmland.

Ottelia acuminata, an edible aquatic plant endemic to southwest China, is in full bloom on Lugu Lake in Yunnan province. [Photo by Luo Hua/for chinadaily.com.cn]
The plant has been dubbed the "vane" or "touchstone" of water quality.
Water quality and ecological conditions are high-grade when Ottelia acuminata is seen blooming on the water surface.
Lugu Lake is now the most stable lake with the best water quality of the nine plateau lakes in Yunnan, according to the provincial government.

Ottelia acuminata, an edible aquatic plant endemic to southwest China, is in full bloom on Lugu Lake in Yunnan province. [Photo by Luo Hua/for chinadaily.com.cn]

Ottelia acuminata, an edible aquatic plant endemic to southwest China, is in full bloom on Lugu Lake in Yunnan province. [Photo by Luo Hua/for chinadaily.com.cn]

Ottelia acuminata, an edible aquatic plant endemic to southwest China, is in full bloom on Lugu Lake in Yunnan province. [Photo by Luo Hua/for chinadaily.com.cn]

Ottelia acuminata, an edible aquatic plant endemic to southwest China, is in full bloom on Lugu Lake in Yunnan province. [Photo by Luo Hua/for chinadaily.com.cn]

Ottelia acuminata, an edible aquatic plant endemic to southwest China, is in full bloom on Lugu Lake in Yunnan province. [Photo by Luo Hua/for chinadaily.com.cn]