Rhododendron maddenii subsp. crassum (Franch.) Cullen
Ericaceae
| Collection Number | not collected |
| Collectors | |
| Identified By | |
| Source | C. Davidson |
| Date | 25 June 2006 |
| Country | USA |
| state | California |
| county | Mendocino |
| Garden | Mendocino Coast Botanical Garden |
| Location | 18220 No. Highway 1, Fort Bragg |