| Araucaria hunsteinii | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Pinophyta |
| Class: | Pinopsida |
| Order: | Araucariales |
| Family: | Araucariaceae |
| Genus: | Araucaria |
| Section: | A. sect. Intermedia |
| Species: | A. hunsteinii |
| Binomial name | |
| Araucaria hunsteinii | |
Araucaria hunsteinii (Klinki , Klinkii or "Klinky", native names Rassu and Pai) is a species of Araucaria native to the mountains of Papua New Guinea. It is threatened by habitat loss.
It is a very large evergreen tree (the tallest in New Guinea, and the tallest species in its family), growing to 50–80 metres (164–262 ft) tall, exceptionally to 90 metres (295 ft), with a trunk up to 3 metres (10 ft) diameter. The branches are horizontal, produced in whorls of five or six. The leaves are spirally arranged, scale-like or awl-like, 6–12 centimetres (2–5 in) long and 1.5–2 centimetres (5⁄8–3⁄4 in) broad at the base, with a sharp tip; leaves on young trees are shorter (under 9 centimetres (4 in)) and narrower (under 1.5 centimetres (5⁄8 in)). It is usually monoecious with male and female cones on the same tree; the pollen cones are long and slender, up to 20 centimetres (8 in) long and 1 centimetre (3⁄8 in) broad; the seed cones are oval, up to 25 centimetres (10 in) long and 14–16 centimetres (5+1⁄2–6+1⁄4 in) broad. The seed cones disintegrate at maturity to release the numerous 3–4 centimetres (1–1+1⁄2 in) long nut-like seeds.
Cultivation and uses
It is a fast-growing tree, and is being tested as a potentially important timber crop in tropical highland climates.
Pests
Barinae spp.,[Gray 1] Setomorpha rutella,[Gray 2] Microlepidopteras,[Gres. 1] Cacatua galerita (the Sulphur-crested cockatoo) are pests of pine nut production in A. hunsteinii. C. galerita may cause half of the seed crop to be lost in a year, mostly by trying to eat cones that are not yet ready.[Gres. 2] However, another source describes A. hunsteinii as suffering few pests in plantations, and therefore substituting A. cunninghamii in plantations that suffer more from pests.[2]
References
- ↑ Thomas, P. (2013). "Araucaria hunsteinii". IUCN Red List of Threatened Species. 2013: e.T32836A2825399. doi:10.2305/IUCN.UK.2013-1.RLTS.T32836A2825399.en. Retrieved 15 November 2021.
- ↑ Wylie, F. R. (1982). "Insect problems of Araucaria plantations in Papua New Guinea and Australia". Australian Forestry. Taylor & Francis (Informa UK Limited). 45 (2): 125–131. doi:10.1080/00049158.1982.10674343. ISSN 0004-9158.
- Gray (Department of Forests, Bulolo, T.P.N.G.), B. (20 August 1968). "Forest Tree and Timber Insect Pests in the Territory of Papua and New Guinea". Pacific Insects. Entomology Department, Bishop Museum. 10 (2): 301–323. S2CID 86282067.
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- ↑
Curculionidae
- 9. Barinae sp.
- COLLECTIONS: In seed cone of Araucaria hunsteinii, Bulolo, M. D., 29.VIII.1967 (J. Thompson).
- DISTRIBUTION AND BIOLOGY : The weevil honeycombs extensively the cones of A. hunsteinii seeds in the virgin forest (Havel 1962). Up to 30-40% of the seed may be damaged ; the damage varies considerably from area to area in the Wau-Bulolo area (J. Thompson, pers. comm., 1967).
- 9. Barinae sp.
- ↑
Tineidae
- 51. Setomorpha rutella Zeller
- COLLECTIONS: In seed of Araucaria hunsteinii, Bulolo, M. D., VI.1964 (J.L.R. Godlee).
- DISTRIBUTION AND BIOLOGY : G. S. Dun reared adults from the seed collected by Mr Godlee. The larvae cause considerable damage to the seed.
- 51. Setomorpha rutella Zeller
- Gressitt, J. L., ed. (1982). Biogeography and Ecology of New Guinea. Monographiae Biologicae. Vol. 42. Dordrecht: Springer Netherlands. p. 390. doi:10.1007/978-94-009-8632-9. ISBN 978-94-009-8634-3. ISSN 0077-0639. S2CID 26922762.
- ↑
p. 391, 4.5. Insect pests of Araucaria species in New Guinea
- A number of as yet unidentified members of the Microlepidoptera also cause much wastage in cones of A. cunninghamii and A. hunsteinii."
- ↑
p. 391, 4.6. Other predators
- ...
- The foraging activity of birds such as the Sulphur-Crested Cockatoo (Cacatua galerita) may lead to destruction of half or more of annual cone crops. Department of Forests (PNG) records suggest that over 50% of the A. hunsteinii cone crop in the Susu Mountain area, Bulolo was destroyed by cockatoos in successive years (1966 and 1967). Cacatua galerita is a notoriously wasteful eater and most seed is lost through the premature fall of green cones which are left to rot on the forest floor."
- Howcroft, N. H. S. (1978). Data sheets on species undergoing genetic impoverishment: Araucaria hunsteinii. Forest Genetics Resources Information 8: 31–37.
- Russo, R. O., & Briscoe, C. B. (2002). Performance of Klinki (Araucaria hunsteinii K. Schuman) in the Humid Tropics of Costa Rica. Journal of Sustainable Forestry 14 (4): 13–18.