Clematis 'Irumagawa'
Japanese large-flowered variety, tepals white. Anthers reddish purple. The cultivar name is the name of a river (Saitama Pref.).
| Group: | Early large-flowered group |
| Pruning: | Light prune (Group 2) |
| Raised by: | Masashi Nakamura |
| Country of origin: | Japan |
| Date raised: | 1992 |