Edible Perennials:
Won't grow:
camass -bulb, camassia quamash
groundnut- peanut?
udo -Aralia cordata, stems

chaya -tree spinach, Cnidoscolus aconitifolius
air potato -Dioscorea bulbifera
fuki-Petasites japonicus, aster, butterbur, sweet-coltsfoot
pitpit -cane
katuk -tropical asparagus, rosids, Sauropus androgynus, star

gooseberry
vines: basket vine, chayote,

arracacha -root tuber, Arracacia xanthorrhiza, aster
belembe -Xanthosoma brasiliense, Arum, taihtian taro
purple tree colard
sea kale -crambe maritima
skirret -root
yacon -tuber, peruvian ground apple
yellow asphodel
musk mallow -herb
ramson -bulb

Might grow:
oca tuber -Oxalis tuberosa, rosid
saltbush -orache, amaranth family, leaves, berry
sea beet
burdock -gobo

Can grow:
tannier -tuber, cocoyam
taro -tuber, dasheen
achira -canna edulis, African arrowroot
From book by E.T.