Subantarctic Tree Daisy – daisies up the windy subantarctic cliffs

daisies up the windy subantarctic cliffs

Size: Height: 1-5 m
Lifespan: Perennial
Diet: Not applicable - autotrophic. Photosynthetic shrub or small tree. Obtains nutrients from thin subantarctic soils.
Habitat: Subantarctic islands. Grows on coastal cliffs, tussock grasslands, and exposed slopes. Tolerates strong winds and salt spray.
Range: Endemic to New Zealand's subantarctic islands. Found on the Snares Islands and the Auckland Islands.
Endemism: Endemic
Main Threats: Climate change is the primary threat. Warming temperatures could alter growth patterns. No other significant threats due to isolation.
Population: Restricted to the Snares Islands and Auckland Islands. Populations stable due to island isolation. Not threatened.
Conservation Status: data_deficient
Human Risk: harmless
Handling Note: native shrub, safe to handle
Conservation Note: Endemic tree daisy restricted to Campbell Island; data insufficient for full threat classification.
Assessment: NZTCS Vascular Plants (2023)
Te Ao Māori: Macrolearia lyallii has no recognised Māori name, as it grows on subantarctic islands that were not traditionally visited by Māori. The Snares Islands and Auckland Islands are part of the southern heritage of Ngāi Tahu. This tree daisy represents the unique flora of the subantarctic, a region of deep spiritual and ecological significance.

The flowering season is brief. Macrolearia lyallii makes the most of it. The subantarctic summer only lasts a few weeks. The plant has large, leathery leaves and clusters of white flowers that appear in summer. It looks like a rhododendron. But it is actually a daisy. It grows on the subantarctic islands. Where the wind never stops. Where the sea is always cold. It looks like something from a different continent. It is pure New Zealand. The leaves are thick, glossy, dark green. Up to fifteen centimetres long. They are built to withstand the wind. The plant is a shrub or small tree. Reaching three metres or more in sheltered spots. On exposed sites, it grows low and sprawling. The wind sculpts it. The salt tests it. It persists. The flowers are white, daisy-like, with yellow centres. They appear in summer. Clustered at the tips of branches. Macrolearia lyallii was once known as Olearia lyallii. In 2022, the genus Macrolearia was created to house the largest-leaved tree daisies. The name means "large daisy". It fits. These are not your garden daisies. The species is named for David Lyall. A nineteenth-century surgeon and naturalist. He collected plants on the subantarctic islands. He travelled with the Ross expedition. He saw places few Europeans had seen. He brought back specimens. The daisy is named for him. On the Snares Islands, Macrolearia lyallii forms dense thickets among the tussock. The islands are remote. Rarely visited. The plants grow without disturbance. They have been there for thousands of years. Climate change is a threat. The subantarctic islands are warming. The wind patterns are shifting. The daisy may struggle. It has nowhere to go. The next land south is Antarctica. The subantarctic tree daisy is not cultivated. It is too difficult to grow. It needs the cold. The wind. The salt. It belongs to the islands. It does not want to leave. Macrolearia lyallii has no recognised Māori name. It grows on subantarctic islands that were not traditionally visited by Māori. The Snares Islands and Auckland Islands are part of the southern heritage of Ngāi Tahu. This tree daisy represents the unique flora of the subantarctic. A region of deep spiritual and ecological significance.