points to pre-European cross-Pacific travel. Known as kumara (from the Maori language kumara), the most common cultivar now is the red 'Owairaka', but orange ('Beauregard'), gold, purple and other cultivars are also grown.

Habitat

The plant does not tolerate frost. It grows best at an average temperature of 24 °C, with abundant sunshine and warm nights. Annual rainfalls of 750 - 1000 mm are considered most suitable, with a minimum of 500 mm in the

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