William Colenso wrote this article about plants
cultivated by Māori for food, published in
1880.
More suggestions and sources
Ballard, C., and others, eds. The sweet
potato in Oceania: a reappraisal. Pittsburgh:
Dept. of Anthropology, University of Pittsburgh;
Sydney: University of Sydney, 2005.
Best, Elsdon. Māori agriculture: the
cultivated food plants of the natives of New
Zealand: with some account of native methods of
agriculture, its ritual and origin myths.
Wellington: Te Papa, 2005 (originally published
1925).
Horrocks, M. ‘Polynesian plant subsistence in
prehistoric New Zealand: a summary of the
microfossil evidence.’ New Zealand Journal of
Botany 42 (2004): 321–334.
Leach, Helen. 1,000 years of gardening in
New Zealand. Wellington: Reed, 1984.