Lagarostrobos

Lagarostrobos franklinii
Huon Pine in a Tasmanian botanical garden.
Conservation status
Scientific classification
Kingdom: Plantae
Division: Pinophyta
Class: Pinopsida
Order: Pinales
Family: Podocarpaceae
Genus: Lagarostrobos
Species: L. franklinii
Binomial name
Lagarostrobos franklinii
(Hook.f.) Quinn

The species Lagarostrobos franklinii is a species of conifer native to the wet southwestern corner of Tasmania, Australia; it is the sole species in Lagarostrobos; one other species L. colensoi formerly included has been transferred to a new genus Manoao. The genus was also formerly included in a broader circumscription of the genus Dacrydium. [1]

Lagarostrobos franklinii is often known as the Huon pine or Macquarie pine, although it is actually a podocarp (Podocarpaceae) not a true pine (Pinaceae). [2] [3]

It is a slow growing, but long-lived tree; some living specimens of this tree are in excess of 2000 years in age. [4] It grows to 10 to 20 m tall, exceptionally reaching 30 m, with arching branches and pendulous branchlets. The leaves are spirally arranged, very small and scale-like, 1 to 3 mm long, covering the shoots completely. It is dioecious, with male (pollen) and female (seed) cones on separate plants. The male cones are yellow, 5 to 8 mm long and 1 to 2 mm broad. The mature seed cones are highly modified, berry-like, with 5 to 10 lax, open scales which mature in 6–8 months, with one seed 2 to 2.5 mm long on each scale. Unlike the closely related New Zealand genus Manoao, the scales do not become fleshy and are water-dispersed, not bird-dispersed (Molloy 1995).

A stand of trees reputed to be in excess of 10,500 years in age was recently found in Western Tasmania on Mount Read. Each of the trees in this stand is a genetically identical male that has reproduced vegetatively. Although no single tree in this stand is of that age, the stand itself as a single organism has existed that long. [5]

The wood was highly prized for its golden yellow colour, fine grain and natural oils that resisted rotting. The chemical that gives the timber its unique smell and preservative qualities is methyl eugenol. Heavy logging of the trees for its timber coupled with the trees' slow growth has led to remaining stands being less than 105 square kilometres (26,000 acres). [6] [7] [8] [9] [10] [11]

The remaining stands of this species of tree now have protected status within the Tasmanian Wilderness World Heritage Site.[12]

It has been planted in the grounds of Crathes Castle, Aberdeenshire, Scotland and has done well. Two healthy specimens can also be found at Torosay Castle, Isle of Mull.[13]

References and external links

  1. ^ Quinn, C. J. 1982. Taxonomy of Dacrydium Sol. ex Lamb. Australian Journal of Botany 30: 311-320.
  2. ^ Molloy, B. P. J. 1995. Manoao (Podocarpaceae), a new monotypic conifer genus endemic to New Zealand. New Zealand Journal of Botany 33: 183-201. Available online (pdf file).
  3. ^ Conifer Specialist Group (2000). Lagarostrobos franklinii. 2006. IUCN Red List of Threatened Species. IUCN 2006. www.iucnredlist.org. Retrieved on 11 May 2006.
  4. ^ http://www.stors.tas.gov.au/au-7-0095-03714
  5. ^ http://pandora.nla.gov.au/pan/68811/20070412-0000/www.blognow.com.au/gumnuts/45647/Could_a_tree_be_10000_years_old.html
  6. ^ Huon Pine /​ [compiled and edited by staff of the Tasmanian Museum and Art Gallery, Hobart: Tasmanian Museum and Art Gallery, 1977. Published to coincide with an exhibition on Huon pine, Tasmanian Museum and Art Gallery, 28 June-28 August 1977. ISBN 0724602658
  7. ^ M.J. Peterson.(1990) Distribution and conservation of Huon Pine /​ [Hobart] : Forestry Commission
  8. ^ Garry Kerr &​ Harry McDermott (1999 and 2004) The Huon pine story : the history of harvest and use of a unique timber Portland, Vic. : Mainsail Books, ISBN 0957791704
  9. ^ Millington, R.J. (1983) Huon pine - endangered? Hobart : Board of Environmental Studies, University of Tasmania Environmental studies occasional paper ; 9. ISBN 0859012123
  10. ^ Scott, Paul & Australian Broadcasting Corporation & Screen Tasmania & Paul Scott Films & Mainsail Books (2004). In The oldest living Tasmanian the Huon pine : the true story about a tree that has transformed the lives of generations. Paul Scott Films, [Balmain, N.S.W.]
  11. ^ David L. Hopkins. (2004) The Huon Piners. Devonport, Tas. : D. Hopkins, 2004. A brief history in pictures and text of the men logging Tasmania's unique timber. "With a biographical narrative of his experiences as one of the last pine loggers Gordon Abel"--Cover.
  12. ^ http://www.parks.tas.gov.au/wha/whahome.html Tasmanian Wilderness World Heritage Area
  13. ^ "Half-hardy trees in Britain and Ireland - part two". Royal Horticultural Society. http://www.rhs.org.uk/NR/rdonlyres/831C8FEF-445C-4FA3-8951-AA257A07F238/0/halfhardytrees.pdf. Retrieved 2009-06-18.