Single Record
Participant Info
- Species
- Bouteloua simplex [Chondrosum simplex] [Chondrosum procumbens] [Chondrosum prostratum]
- Family
- Poaceae
- CommonName
- matted grama, mat grama
- Presence
- yes
- Status
- native
- EarliestDate
- 1935
- LatestDate
- 2025
- Ecosystem
- basin, shrubland, foothill, ruderal, urban
- Geobotanical
- SSawatch, Garitas, SSanjuans, UBasin, LBasin
- Counties
- Alamosa, Conejos, Costilla, Rio Grande, Saguache
- Passes
- WildlifePreserves
- Other Localities
- Alamosa (town), Del Norte
- Comments
- In the Watershed matted gramma—annual and warm-season—has spread along road and street sides from its native habitat in dry grassland, bushy foothills, and Ponderosa pine openings. Bouteloua simplex can be confused with B. gracilis, but B. simplex is annual and has only one spike per culm, which on lower culms often takes on a purplish cast. Also the lower inflorescence differs from the upper. The species was sometimes planted along town streets. In Del Norte, for instance, hundreds of plants recently have been observed (2023-2025) along south 9th street. The USA distribution is centered in northern and eastern Arizona, New Mexico, and in the Front Range and the southwest counties of Colorado. It follows the Rio Grande drainage through New Mexico into the far western tip of Texas.
- Annotation