Agathis robusta aka Dundathu Pine

Agathis robusta is a large evergreen conifer called Queensland kauri. It belongs to the Araucariaceae family. Its native range covers New Guinea and the Bismarck Archipelago. It also grows wild in eastern Queensland, Australia. It lives in rainforests, including sites with a drier climate. These forests extend from coastal lowlands into the mountains. The tree grows slowly but can live for many years.

Trees generally reach 82–98 feet [25–30 metres] in height. Some reach 141 feet [43 metres]; other accounts give 148 feet [45 metres]. The trunk grows straight and forms a round column. It can reach 3.3–4.9 feet [1–1.5 metres] across, or more. As trees grow, they shed their lower branches. This leaves a bare trunk for over half their height. Forest trees often have a small, dense crown. Trees in open sites develop a longer crown. The tree keeps its foliage throughout the year. It bears male cones and female seed cones. Wind carries its pollen.

Queensland kauri grows in warm temperate and tropical climates. It prefers deep, rich soil that drains well. Keep the soil moist rather than letting it stay dry. Sandy, loamy and clay soils can all suit it. It accepts mildly acid, neutral and mildly alkaline conditions. Mature trees grow in full sun or light shade. Young plants grow better with woodland shade and shelter. Their need for light rises as they grow larger. Seed provides a means of raising new plants.

The tree can withstand light frost. Reports from Australian gardens record survival near 19°F [−7°C]. That limit does not transfer safely to cooler British gardens. Cool summers may leave new growth less hardened before winter. Longer, colder and wetter winters add further stress. PFAF lists USDA hardiness zones 8–11. Its great height suits a woodland canopy role. Allow for its long-term size when choosing a site.

Its strong, lasting wood has served for floors and cabinets. The tree also yields fibre and resin for varnish. Heavy timber cutting has made it scarce in some areas. Useful Tropical Plants reports a 2011 IUCN status of Least Concern. PFAF lists no known food or medicinal uses. Both reference accounts report no known hazards. That wording does not establish that every part is safe to eat.