Setaria cernua is a species of grass

Grass

Grasses, or more technically graminoids, are monocotyledonous, usually herbaceous plants with narrow leaves growing from the base. They include the "true grasses", of the Poaceae family, as well as the sedges and the rushes . The true grasses include cereals, bamboo and the grasses of lawns ...

 in the Poaceae

Poaceae

The Poaceae is a large and nearly ubiquitous family of flowering plants. Members of this family are commonly called grasses, although the term "grass" is also applied to plants that are not in the Poaceae lineage, including the rushes and sedges...

 family.
It is endemic to Ecuador

Ecuador

Ecuador , officially the Republic of Ecuador is a representative democratic republic in South America, bordered by Colombia on the north, Peru on the east and south, and by the Pacific Ocean to the west. It is one of only two countries in South America, along with Chile, that do not have a border...

.

It is a grass endemic to Andean Ecuador, where it is common and frequent in dry areas of Imbabura

Imbabura Province

Imbabura is a province in Ecuador. The capital is Ibarra. The people of the province speak Spanish and the Imbaburan Quechua language.Imbabura Volcano is located in the province. Best reached from the town of La Esperanza, the 4,609-meter-high mountain can be climbed in a single day.- Cantons...

, Carchi

Carchi Province

- Economy :The provincial economy is based on industrial, and agriculture productions. Carchi produces food, drinks, tobacco, and dairy products. The agriculture sector produces potatoes, maize, etc. - Cantons :The province is divided into 6 cantons...

 and Chimborazo

Chimborazo Province

Chimborazo is a province in Ecuador, located in the central Ecuadorian Andes, containing a section of Sangay National Park. The capital is Riobamba. The province contains Chimborazo , Ecuador's highest mountain.- Cantons :...

 provinces. At least 11 subpopulations have been recorded, some of them protected by the Parque Nacionale Llanganates, the Parque Nacional Sangay and the Reserva Ecológica Cayambe-Coca

Cayambe Coca Ecological Reserve

Cayambe Coca Ecological Reserve is a nature reserve in Ecuador located along the Equator a little over 60 miles from Quito. The park encompasses an area of .-Fauna:...

. Apart from habitat destruction, no specific threats are known.