Alocasia sp. 'New Guinea Gold' is an undescribed yet species found in by David Burnett and Roland Wagner in Papua New Guinea in the 80's. It displays very uneven spurts of variegation - it is know to go green for for months, and then suddenly it will grow foliage completely covered with yellow splashes and spots, before reverting to green and then restarting the cycle. So even if you have a plant with only solid green leaves, it is bound to grow some with variegation at some point.
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The name 'New Guinea Gold' was made up by Burnett and Wagner not because of the plant's colouration, but because they have expected that they "would make a fortune by having it tissue cultured!!!!"
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Genus name comes form the Greek words a meaning without and Colocasia the name of a closely allied genus, form which it was separated.
Alocasia sp. 'New Guinea Gold'
Alocasia sp. 'New Guinea Gold' comes in a ⌀ 27 cm pot and is ca. 100cm tall