Senecio canus Hook.
Asteraceae
| Collection Number | C. Davidson 13666 |
| Collectors | C. Davidson, S. R. Christoph |
| Identified By | C. Davidson |
| Source | C. Davidson |
| Date | 18 June 2017 |
| Country | USA |
| state | Idaho |
| county | Butte |
| Location | On Hwy 20 ca. 18 km W of Arco and 0.5 km E of Craters of the Moon. Elev. 1598 m. |
| Lat/Long | N 43 32 43.1 W 113 29 20.7 |
| Note | Crevices in open basalt flow. |