Macrolearia lyallii is a New Zealand plant from the genus Olearia. It is commonly known as the subantarctic tree daisy. The species is endemic to the Snares Islands and southern New Zealand, and has also established itself as an introduced species on the Auckland Islands, from where the type specimen was described.Campbell, D & Rudge, M (1976) "The case for controlling the distribution of the tree daisy Olearia lyallii Hook. F. in its type locality, Auckland Islands" Proceedings of the New Zealand Ecological Society 23 109-115 O. lyallii forms trees up to tall with trunks 50 cm in diameter.
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