I would not recommend eating tuberous roots of
any daylily. Like some other plants daylilies can contain a poison in their roots. It is not confidently known which ones are safe (if any) and under what circumstances the roots are poisonous and under what circumstances they might be safe.
The situation with daylily roots/tubers is that one might be able to eat them safely a hundred times and then on the 101st time the roots are poisonous. It is possible to die.
The older name for the toxin was hemerocallin; the newer name is stypandrol.
Structure and distribution of a neurotoxic principle, hemerocallin.
http://www.sciencedirect.com/s...
A quote from the introduction to this research:
"The roots of
Hemerocallis species (daylilies) ingested by goats, sheep and cattle, and used for the treatment of schistosomiasis (snail fever) in humans, have caused
fatalities in the People’s Republic of China."
Stypandrol, a Toxic Binaphthalenetetrol Isolated from Stypandra imbricata
http://www.publish.csiro.au/pa...
Preparation and Crystal Structure of Acetyl Hemerocallin and Structural Revision of Hemerocallin
https://www.researchgate.net/p...
