Sporobolus caespitosus 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 Ascension Island

Ascension Island

Ascension Island is an isolated volcanic island in the equatorial waters of the South Atlantic Ocean, around from the coast of Africa and from the coast of South America, which is roughly midway between the horn of South America and Africa...

, in the South Atlantic Ocean, where it is known only from the weather side of the Green Mountain

Green Mountain

Green Mountain is a common name for "The Peak", the highest point, on Ascension Island which has gained some fame for claims that it is one of very few large-scale artificial forests.-History and Vegetation:...

 area, where it occupies an area of less than 0.5 km². It inhabits the vertical and sloping cinder banks of Green Mountain where very few other species are present, and seems to be adapted to the exposed conditions found at these sites. It is threatened by introduced vegetation and habitat loss.

Source

• Gray, A. 2003. Sporobolus caespitosus. 2006 IUCN Red List of Threatened Species. Downloaded on 20 July 2007.