R. campanulatum ssp campanulatum 'Roland Cooper'
Species selection of R. campanulatum ssp campanulatum
| Selected By | Unknown |
| Introduced | 1964 |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | ? |
| Predominant Colour | ? |
| Leaves | ? |
| Winter Foliage | ? |
| Hardiness | ? |
| Selected By | Unknown |
| Introduced | 1964 |
| 10 Year Height | ? |
| Bloom Time | ? |
| Flower | ? |
| Predominant Colour | ? |
| Leaves | ? |
| Winter Foliage | ? |
| Hardiness | ? |