R. 'Mary Drennen'
Rhododendron Hybrid
| Hybridized By | Larson, H.L. |
| Seed Parent | R. 'Angelo Group' |
| Pollen Parent | R. wardii var wardii |
| Introduced | 1955 |
| 10 Year Height | ? |
| Bloom Time | late midseason |
| Flower | ? |
| Predominant Colour | ? |
| Leaves | ? |
| Winter Foliage | ? |
| Hardiness | ? |
| Status | IRRC registered. |
|