R. 'Adder Group'
Rhododendron Cultivar group
| Hybridized By | Rothschild, L. de |
| Seed Parent | R. thomsonii ssp thomsonii |
| Pollen Parent | R. diphrocalyx |
| Introduced | 1933 |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | campanulate |
| Predominant Colour | ? |
| Leaves | ? |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |