We’ve long been fascinated with hardy tuberous aroids, and one that we’ve long-loved and grown are from the little-known genus Remusatia. The genus contains only four species native to a large region spanning from the Himalayas to China. All are small, woodland perennials that grow well with most Hosta and ferns. For some reason, Remusatia tend to work themselves out of the soil after several years, so we recommend replanting them deeper every 3-5 years in cold winter climates.
Remusatia hookeriana has a huge range, from the Himalayas to Thailand. Our garden clone below is from a Vietnamese population.

Remusatia pumila is the smallest species that spreads slowly (and gently) in the woodland garden. This is our selection Remusatia ‘Mini Mask’ that we introduced in 2003.

Do you have R vivipora? Yellow flowers and seed bearing stalks sprouting from base covered with small seeds that look like mini cockleburs. Seeds hook on to anything and are dispersed in that manner.. Had plants for may years at my old job, but none now. /were on many Index Seminums from European Gardens.
Well, sold it for years, and we had 14 collections planted around the gardens, but lost them all during a particulary cold winter around 2010, when our winter low temperature dropped below 10 degrees F.