Athrotaxis cupressoides Seeds | Pencil Pine
LATIN NAME: Athrotaxis cupressoides
COMMON NAME: Pencil Pine
Plant Profile
Athrotaxis is a small genus of just three Tasmanian endemics, and the pencil pine is the most narrowly distributed of the three. It clings to the cool, wet slopes of the central highlands, where cloud and drizzle keep the forest floor damp through most of the year. Its nearest relatives in the cypress family are spread across the southern hemisphere, a reminder that this lineage once ranged far more widely before the landmasses separated.
The name comes from the foliage. The small, scale-like leaves are pressed flat and close along the branches, overlapping like tiles, so the whole tree reads as a slender green column rather than a bushy conifer. The leaves are dark green above and marked with a pale band of pores beneath, a feature that helps the tree manage moisture in its misty home. This tight, columnar habit is the most useful field clue for identification.
The small, rounded cones are borne on short stalks and take more than a single season to ripen, a slow schedule that is unusual among the cypress family. Male and female cones sit on the same tree, and once the woody cones mature they release only a few seeds at a time. Because so few seeds are produced and the tree is slow to recover after damage, natural renewal is a slow business in the wild.
In its homeland the pencil pine is used as a windbreak and specimen tree, prized for the narrow, upright silhouette that slices through wind rather than catching it. It is a long-lived tree when left unburned, and its dense column makes an effective shelterbelt on exposed ground.
Science & Biotechnology
Like many conifers, the resin is built around diterpene acids in the abietic acid family, compounds that give the wood its scent and its resistance to rot and insects. Work on Tasmanian conifer extracts has looked at how these acids vary between the three Athrotaxis species, a subtle chemical fingerprint that mirrors their separate evolutionary paths. The chemistry is also why freshly cut timber smells distinctly of cedar.
Because seedlings are scarce and slow, nurseries have explored micropropagation from shoot tips to build clonal lines of useful forms. Sterile culture of the pencil pine is demanding, but it offers a way to multiply a known tree without depending on the erratic seed crop. This biotech route matters most for conservation, where a handful of genotypes can be preserved against the next wildfire.
Uses & Benefits
The pencil pine produces a fragrant oleoresin that has long interested wood chemists. The heartwood is naturally durable and resists decay, which is why the tree was valued for fence posts and outdoor timber in the early years of Tasmanian settlement.
The durable heartwood was historically cut for posts and rails that could stand in the ground for decades without treatment. Modern use is mostly ornamental, but the timber reputation persists among growers who value naturally rot-resistant wood. Because the wild resource is now protected, any planting material should come from cultivated stock rather than wild collection.
Growing from Seed
Outside Tasmania the pencil pine is a collector’s conifer for cool, moist maritime gardens where frost is common. It dislikes heat combined with humidity and will struggle in warm lowland climates, so it suits mountain and coastal gardens best. Given shelter from harsh dry winds, it forms a slim, architectural feature that few other conifers can match.
Sowing the pencil pine is a test of patience. The seed is few and slow, and the seedlings need cool, even moisture from the start.
Sow the seed on a free-draining, sandy medium in a cold frame and keep it cool and damp through the cold months. A period of cold stratification improves and evens out the appearance of the seedlings, which can otherwise emerge irregularly. Do not cover the seed deeply; a light scattering of fine grit over the surface is enough to hold it in place.
Space young trees so air moves freely between them, and watch the moisture level through any dry spell in the first summers. The pencil pine resents drying at the roots, so a mulch of leaf litter helps keep the soil cool. Move plants to their final position while still small, because the slender root system dislikes repeated disturbance.
Our Take
If you are building a collection of cold-climate conifers, the pencil pine sits naturally beside the lacebark pine and the Japanese fir, both of which share its taste for cool, moist air. For a tighter composition try the Chinese juniper, whose scale foliage echoes the pencil pine’s own. The one rule that overrides all others is fire protection: keep this tree well away from any burnable margin, because once burnt it rarely returns.
Related Reading
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