No synonyms. Type locale is simply "Van Diemen's Land" (Tasmania), as collected by Ronald Campbell Gunn (1808-1881), pioneering Tasmanian botanist. Gunn was a busy fellow in 1838, finding time for a visit to Flinders Island with Sir John Franklin (who had founded the Tasmanian Society for the Study of Natural Science during the previous year) while holding down a job as assistant police superintendent in Hobart, so it is difficult to say where this specimen was likely to have been collected; but in 1840 in the company of Joseph Dalton Hooker, both Gunn and Hooker collected it on the Pine River in the Central Highlands. At the time, this would have been the easiest place to find the species; with the exception of Mt. Field, another plausible type locality, the rest of the species' range appears as white space on an 1837 map of Tasmania. It may be that since the visiting Hooker was the son of W. J. Hooker, one of the most prominent botanists of the day, Gunn was likely taking Hooker on a tour of Tasmanian botany and would have wanted to show him this, one of Gunn's more notable discoveries (inference based on Gunn's biography by Burns and Skemp , and on collection records HO2846 and HO2849 at the Australia Virtual Herbarium).
Trees to 20 m tall and 100 cm dbh, single or multi-stemmed, with a conical crown that becomes irregular with age; may also form a krummholz or layer or sucker to form a multistemmed clone. Bark light brown, flaky, fibrous, becoming furrowed with age, exfoliating in long thin strips. Foliage branchlets numerous, mostly alternate, spreading, forming roughly globose foliar units 20-40 cm diameter. Leaves helically arranged on twigs in 5 ranks, on terminal twigs 3-6 × 2-3 mm, fused at base, decurrent, imbricate, appressed, the visible part keeled, rhombic-oblong; margins thin hyaline, apex obtuse; usually with widely spaced stomata in two faint bands. Pollen cones terminal, solitary, othe base surrounded by shortened leaves 3-5 mm long, yellowish turning brown, comprised of 10-15 helically arranged broad-triangular microsporophylls. Seed cones terminal, solitary, globose, 10-16 mm diameter, pale green turning brown, each composed of 10-15 helically arranged scales; opening slightly upon maturity, typically retained on the tree for about one additional year. Scales woody at maturity, each with a centrally-depressed apex bearing a recurved, acute bract tip; lower surface rough and wrinkled, upper surface striated. Seeds 20-30 per cone, obovate, 1.5-2 mm long with 2 wings each ca. 1 mm wide (Farjon 2010 and field observations, 2015). Cotyledons 2, germination epigeal" (Silba 1986).
Australia: W. Tasmania, montane to subalpine (700-1,300 m elevation) on peaty or wet-rocky soils, commonly with Sphagnum cristatum, Gleichenia alpina, Leucopogon hookeri, Restio australis, Gymnoschoenus sphaerocephalus, Orites acicularis, Richea scoparia, Richea pandanifolia, Nothofagus gunnii, Astelia alpina, Diselma archeri, Pherosphaera hookeriana, Athrotaxis selaginoides, and Eucalyptus coccifera; at lower altitudes, often with Nothofagus cunninghamii and Phyllocladus aspleniifolius (Farjon 2010). The species is primarily associated with the Athrotaxis cupressoides open woodland, Athrotaxis cupressoides-Nothofagus gunnii short rainforest, and Athrotaxis cupressoides rainforest vegetation communities; it is also a component of the eastern alpine sedgeland, Athrotaxis selaginoides subalpine scrub, subalpine Leptospermum nitidum woodland, Athrotaxis selaginoides-Nothofagus gunnii short rainforest, Athrotaxis selaginoides rainforest, and Nothofagus gunnii rainforest and scrub vegetation communities (Kitchener and Harris 2013). Hardy to Zone 8 (cold hardiness limit between -12.1°C and -6.7°C) (Bannister and Neuner 2001).
A. cupressoides regenerates from seed, and also vegetatively, through root suckers; this is most commonly seen in dense forest stands and in bogs. Exclosure experiments and field observations show that seedlings, suckers and adult foliage are heavily grazed by introduced placental and native marsupial mammals (Cullen and Kirkpatrick 1988). Native populations are also showing signs of a dieback likely caused by an introduced strain of Phytophthora (Farjon 2010).
"At the upper limit of tree growth in western Tasmania, often above the regional Eucalyptus timberline, are scattered stands of the endemic pencil pine. The stands occur beside tarns and on the damp shady backwalls of cirques, where the ice lingered in the waning phases of the last glacial period, and snow accumulates each winter. The regional hazard, fire, rarely penetrates these cool rainy heights and some of the trees are over a thousand years old... The old trees carry poor cone crops, seedlings are almost absent, and the distribution and structure of the populations suggest that regeneration is rare and periodic... I envisage pencil pine as a species expanding its range during the cold variable climate of Pleistocene Tasmania and currently 'sitting out' the Holocene in scattered stands above timberline. Such stands have been present throughout their current range on Mount Field for the last thousand years, but the altitudinal locus of regeneration appears to have shifted. Gradual migrations have occurred and local 'even-aged' stands developed. Great longevity allows the species to track environmental variability on a scale of centuries, regenerating mainly in those periods when favourable combinations of circumstances permit" (Ogden 1985).
The principal themes of Ogden's (1985) assessment have lately been reiterated with a new spin featuring climate change and more data-rich analyses. In 1960–1961, human-ignited wildfires during an extremely dry summer caused the loss of approximately ca. 10% of the geographic extent of A. cupressoides, with little regeneration in the aftermath. Work by Holz et al. (2014) has found that fire frequency did not vary following the arrival of European settlers, and that A. cupressoides populations were able to persist under a regime of low-to-mid severity fires prior to the 1960 fires. However, the 1960 fires were of greater severity than previous fires, and the consequent loss of A. cupressoides has been largely irreversible due to high fuel loading in postfire vegetation communities that are dominated by resprouting shrubs; thus, a fundamental transition to a more fire-prone community. Holz et al. (2014) suggest that the feedback between regeneration failure and increased flammability will be further exacerbated by a warmer and drier climate, restricting A. cupressoides to only the most fireproof environments.
This species forms the habitat of the pencil pine moth, Dirce aesiodora, the larvae of which feed only upon A. cupressoides foliage (and which closely resemble A. cupressoides twigs).
Over 1000 years (cited in Ogden 1985).
A recent but brief review was presented by Allen et al. (2011), as part of an interesting dendroclimatic study. Use of the species had earlier been reviewed by Palmer, Ogden and Norton (Ogden 1978, Ogden 1985, Norton and Palmer 1992, Palmer and Ogden 1992).
Due to its high-elevation habitat and remote growth, it has always had negligible usage, and any use by aboriginal peoples is unrecorded. It is occasionally seen in craftwood, and occasionally (or rarely) in horticulture.
This species is uncommon even in botanical gardens and arboreta. It can be readily seen at the principal National Parks within its range, of which the most accessible and probably the most remarkable is Cradle Mountain National Park. The hike up Cradle Mountain will show you alpine settings of A. cupressoides and local individuals of A. x laxifolia. I also recommend a visit to Mount Field National Park, where the Shelf Tarns walk is one of the best places to see very old specimens of A. cupressoides, including a facinating old forest with many krummholz trees and evidence of major fires. The walk will also turn up occasional A. x laxifolia in various places.
Allen, K. J., J. Ogden, B. M. Buckley, E. R. Cook, and P. J. Baker. 2011. The potential to reconstruct broadscale climate indices associated with southeast Australian droughts from Athrotaxis species, Tasmania. Climate Dynamics, DOI 10.1007/s00382-011-1011-7.
Burns, T. E. and J. R. Skemp. 1966. Gunn, Ronald Campbell (1808–1881). Originally published in the Australian Dictionary of Biography, Volume 1, now online, accessed 2016.02.23.
Cullen, P. J. and J. B. Kirkpatrick. 1988. The ecology of Athrotaxis D. Don (Taxodiaceae). I. Stand structure and regeneration of A. cupressoides. Australian Journal of Botany 36(5):547-560.
Donn, David. 1838. Annals of Natural History 1:235. Available at Archive.org, accessed 2016.02.23.
Holz, A., S. W. Wood, T. T. Veblen and D. M. J. S. Bowman. 2014. Effects of high-severity fire drove the population collapse of the subalpine Tasmanian endemic conifer Athrotaxis cupressoides. Global Change Biology, doi: 10.1111/gcb.12674.
Kitchener, Anne, and Stephen Harris (eds.). 2013. From forest to Fjaeldmark: descriptions of Tasmania's vegetation. 2013. Online, accessed 2016.02.26.
Native Conifers of Tasmania, a short but interesting and well illustrated site maintained by the Department of Environment and Land Management, Parks and Wildlife Service, Tasmania. Accessed 1999.08.11.
Last Modified 2016-02-27