A fabulous Asian Trillium hailing from the area around the Japanese north islands, China, Russia and North Korea, so you know it is hardy!
It displays fresh green leaves and large subtely fragranced white flowers ( usually a little larger than T. grandiflorum). It is also a relatively vigorous grower, once established. It will grow about 40cm tall and 20cm wide.

Trillium camschatcense - 1.3 litre €25
Sold out href="https://commons.wikimedia.org/wiki/File:Trillium_camschatcense_%27Aomori%27_Ker_Gawl.,_Bot._Mag._22_t._855_(1805)_(49809054041).jpg">sunoochi from Sapporo, Hokkaido, Japan, CC BY 2.0, via Wikimedia Commons