Did Maori grow potatoes (Solanum tuberosum) prior to their introduction to New Zealand by Europeans in the late 18th century?

Abstract

It is generally accepted that potatoes (Solanum tuberosum) were first introduced to New Zealand in the late 18th century by early European explorers. The indigenous Maori were quick to recognise the advantages that these new introductions had over their traditional food crops including the kumara. (sweet potato Ipomoea batatas.) This paper examines reports that Maori were in possession of potatoes before the arrival of Europeans and presents evidence that this was unlikely.