| Special Geographical Unit: | Mammoth Creek |
| Verbatim Directions to Locality: | 6.5 mi (10.5 km) W of DeSoto. Banks of Mammoth Creek ca. 0.8 mi (1.3 km) due E of Big River bridge on Mammoth Road. |
| Altitude (in meters): | 175 |
| Latitude - degree: | 38 |
| Latitude - minutes: | 7 |
| Latitude - seconds: | 30 |
| Latitude Direction Flag: | N |
| Longitude - degree: | 90 |
| Longitude - minutes: | 40 |
| Longitude - seconds: | 30 |
| Longitude Direction Flag: | W |
| Township: | 39N |
| Range: | 3E |
| Section: | 11 |
| Habitat: | Small clumps. |
| Non digital information?: | N |
