here are some selections........safewayis still open if you hurry......i presume even romsey has one
Tuberous root
Amorphophallus galbra (Yellow lily yam)
Conopodium majus (pignut or earthnut)
Dioscorea opposita (nagaimo, Chinese yam, Korean yam)
Hornstedtia scottiana (Native ginger)
Ipomoea batatas (sweet potato)
Ipomoea costata (desert yam)
Manihot esculenta (cassava or yuca or manioc)
Mirabilis extensa (mauka or chago)
Psoralea esculenta (breadroot, tipsin, or prairie turnip)
Smallanthus sonchifolius (yacón)