Mentzelia involucrata subsp. megalantha I.M. Johnst.
Loasaceae
| Collection Number | Davidson, C 5558 |
| Collectors | |
| Identified By | |
| Source | C. Davidson |
| Date | 03 March 1977 |
| Country | USA |
| state | California |
| county | Riverside |
| Location | Joshua Tree National Park. On Highway 168 ca. 2 km from park entrance. |
| Lat/Long | N 33 42 07 W 115 48 01 |