totara of the high cold slopes, all gone

Size
Height: 8–12 m
Lifespan
200–500 years
Diet
Herbivorous – absorbed nutrients through extensive root system on high ridges, rocky summits, and exposed slopes of mountain ranges. A tōtara built for the cold – stunted, wind-sculpted, ancient beyond measure. Grew slowly, a few centimetres each year, its wood so dense that it resisted rot for centuries.
Habitat
High ridges, rocky summits, and exposed slopes of the Southern Alps and volcanic peaks of the central North Island. A tōtara built for the cold – stunted, wind-sculpted, ancient beyond measure. Grew slowly, a few centimetres each year, its wood so dense that it resisted rot for centuries. Stood sentinel above the treeline, the last tree before the alpine zone, a survivor of ice ages and volcanic eruptions.
Range
Found on high ridges, rocky summits, and exposed slopes of the Southern Alps and volcanic peaks of the central North Island. Described from subfossil remains – preserved wood, bark, leaves, and pollen – found in alpine deposits and peat bogs at high elevations. Last reliably recorded in the late 19th century.
Endemism
Endemic
Main Threats
Climate warming was the primary threat, reducing its alpine habitat. Also threatened by fire and browsing by introduced mammals. Last reliably recorded in the late 19th century. A few fragments of wood remain in museum collections – dense, dark, resinous, their mountain slopes silent.
Population
A distinct mountain species of tōtara, related to the living lowland tōtara (Podocarpus totara) and Hall's tōtara (Podocarpus cunninghamii). Estimated height 8–12 metres – shorter than its lowland relatives but with a thicker, more gnarled trunk. Trunk diameter 60–80 centimetres. Its leaves were shorter, thicker, and more leathery than any living tōtara, adapted to cold and wind. Last reliably recorded in the late 19th century, gone by the 1920s.
Conservation Status
Extinct
The mighty lowland tōtara grows for a thousand years, its wood red and durable, its bark peeling in long strips. It is a tree of the valleys, the deep soils, the sheltered forests. But there was once a tōtara that lived where no tōtara lives today – the high ridges, the rocky summits, the exposed slopes above the bush line. It was smaller, stunted, twisted by the wind. Its leaves were short and thick, its bark was dark and rough, its wood was so dense it would sink in water. It was the mountain tōtara, and it is gone. Extreme slow growth and cold tolerance made it special. A mountain tōtara might take 500 years to reach 10 metres – a century per metre. Its wood was incredibly dense, resistant to rot and insect attack. Its roots gripped the thin, rocky soil, holding the mountain together. Its leaves were adapted to survive snow and frost, closing their pores to conserve water, turning dark in winter to absorb what little heat the sun offered. It marked the treeline. In a healthy mountain ecosystem, the treeline is not a sharp line but a transition zone – tall trees below, stunted trees above, then scrub, then alpine herbs. The mountain tōtara was the dominant tree of this transition zone, the last tall tree before the open alpine zone. It provided shelter for smaller plants, habitat for birds and insects, and stability for the mountain slope. Its fallen logs – and they fell slowly, persisting for centuries – created microhabitats for alpine plants. Its seeds were dispersed by wind and birds, but germination was slow, and seedlings grew at a glacial pace. It was a conifer, producing male and female cones on separate trees. Pollination was by wind. The seeds took two years to mature – a slow cycle even by conifer standards. That strategy works when the climate is stable. It fails when the climate shifts. Climate warming and fire destroyed it. At the end of the last ice age, the climate warmed rapidly. The mountain tōtara, adapted to cold, could not survive in warmer conditions. Its treeline retreated up the mountain – but there is only so far up you can go. Eventually, there was no mountain left. Fire was the final blow. Polynesian settlers brought fire to the mountains, burning the subalpine scrub to clear hunting grounds. The mountain tōtara, with its dense, resinous wood, burned readily. The old trees, already stressed by warming, could not regenerate after fire. By the time Europeans arrived, the mountain tōtara was already rare. A few scattered individuals may have survived on remote, inaccessible peaks – but by the 1920s, they were gone. The lowland tōtara survived. It is more adaptable, able to grow in a range of conditions. It is the survivor, the tree of the valleys. But the mountain tōtara is extinct. A few fragments of dark, dense wood in a museum drawer, a few pollen grains in a mountain bog, and the memory of a tree that used to mark the treeline. The climate warmed. The fires burned. Then we wondered why the mountain felt so bare.