In the ethnographic museum in Cordoba (Argentina) there is a display
of Patagonian material culture. On a grindstone there lie nuts that
are (superficially, at least) indistinguishable in size and shape from
those of the Australian 'bunya' Araucaria bidwillii.

I can't find any reference on the web to the species in Patagonia from
which these nuts might have come.

Can somebody give me a pointer?

The Australian bunya can be seen at:

http://www.saveurs.sympatico.ca/ency...alie/bunya.jpg

Richard Wright