Here's how the swamp rose (Rosa palustris) currently looks - it hardly loses a leaf all season! I collected this clone when I was just a kid, from a boggy area near where I grew up. This area had visible standing water for most of the winter months and was still relatively moist throughout the drier summer months. Yet, it withstands upland drier conditions pretty well too. Hips should be ready to shell out and send soon [Simon ;0)]. I'll e-mail you for shipping details.