R. 'Joseph Whitworth'
Rhododendron Hybrid
| Hybridized By | Waterer (Bagshot) |
| Seed Parent | R. ponticum |
| Pollen Parent | ? |
| Parentage Summary |
Seed parent is R. ponticum. |
| Introduced | 1865 |
| 10 Year Height | 200 cm. (7ft.) |
| Bloom Time | ? |
| Flower | broadly funnel-shaped |
| Flower Color | ? |
| Fragrance | ? |
| Leaves | elliptic to obovate |
| Leaf persistence | ? |
| Minimum Hardiness | ? |
| Registration | Registered |
