Quamash is Camassia esculenta, dead easy to grow and bulbs are freely available in Autumn. I don't think we paid more than 99p for 10, but don't quote me on that. Never tried eating them though. Flowers rather like a paler smaller agapanthus so nice even if you do not like the taste. Sets copious seed, but probably takes about 3 years to reach flowering size.
The others I have not tried.