I have some spare tubers of these, mainly for Cambridge people. The
chufa and possibly oca I could post.

Oca, Oxalis tuberosum, a slightly lemony potato-like tuber.

Chufa, Cyperus esculentus, very small and nutty like coconut and
its inner rind.

croznes, Stachys affinis, a small tuber like white maggots, crunchy
but rather flavourless.

Please ring C. 843232 or reply to this message.

Regards,
Nick Maclaren.