Pinus dalatensis
Pinus dalatensis | |
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Conservation status | |
![]() Near Threatened (IUCN 3.1)[1] | |
Scientific classification ![]() | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Gymnospermae |
Division: | Pinophyta |
Class: | Pinopsida |
Order: | Pinales |
Family: | Pinaceae |
Genus: | Pinus |
Subgenus: | P. subg. Strobus |
Section: | P. sect. Quinquefoliae |
Subsection: | P. subsect. Strobus |
Species: | P. dalatensis |
Binomial name | |
Pinus dalatensis Ferré | |
Synonyms[2] | |
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Pinus dalatensis, also known as Vietnamese white pine or Dalat pine,[1] is a species of pine endemic to Indochina. In Vietnam it grows in the mountains of the central and south-central parts of the country at elevations of 1,400 to 2,300 metres (4,600 to 7,500 ft).[3][4] Only recently confirmed from Laos, the population located within the Nakai-Nam Theun Biodiversity Conservation Area is the largest, at the lowest elevation, and the northernmost of the known populations of P. dalatensis.[5]
Description
Pinus dalatensis is a medium-sized evergreen tree growing to 30 to 40 metres (98 to 131 ft) tall. It is a member of the white pine group, Pinus subgenus Strobus, and like all members of that group, the leaves ('needles') are in fascicles (bundles) of five, with a deciduous sheath. The needles are finely serrated, and (3-)5–14 cm long.
The cones are slender, 6 to 23 centimetres (2.4 to 9.1 in) long and 2 to 4 centimetres (0.79 to 1.57 in) broad (closed), opening to 3 to 9 centimetres (1.2 to 3.5 in) broad; the scales are thin and flexible. The seeds are small, 6 to 8 millimetres (0.24 to 0.31 in) long, and have a long slender wing 18 to 25 millimetres (0.71 to 0.98 in) long. It is most closely related to the blue pine Pinus wallichiana from the Himalaya.[3][4]
Subspecies
It is divided into two subspecies:[3]
- Pinus dalatensis subsp. dalatensis. Da Lat region, between 11°50'N and 12°30'N. Cones 6–17 cm long.
- Pinus dalatensis subsp. procera Businský. Central Vietnam, between 15°00'N and 16°20'N. Cones 13–23 cm long.
References
- ^ a b Thomas, P.; Phan, K.L. (2013). "Pinus dalatensis". IUCN Red List of Threatened Species. 2013: e.T32803A2823679. doi:10.2305/IUCN.UK.2013-1.RLTS.T32803A2823679.en. Retrieved 20 November 2021.
- ^ "Pinus dalatensis Ferré". World Checklist of Selected Plant Families. Royal Botanic Gardens, Kew – via The Plant List. Note that this website has been superseded by World Flora Online
- ^ a b c Businský, R. (1999). Study of Pinus dalatensis Ferré and of the enigmatic "Pin du Moyen Annam". Candollea 54: 125-143.
- ^ a b Farjon, A. (2005). Pines. Brill ISBN 90-04-13916-8.
- ^ Thomas, P.; Sengdala, K.; Lamxay, V.; Khou, E. (2007). "New Records of Conifers in Cambodia and Laos". Edinburgh Journal of Botany. 64: 37–44. CiteSeerX 10.1.1.621.4622. doi:10.1017/S0960428606000734.
Further reading
- Zsolt Debreczy; Istvan Racz (2012). Kathy Musial (ed.). Conifers Around the World (1st ed.). DendroPress. p. 1089. ISBN 978-9632190617.
External links
- Conifers Around the World: Pinus dalatensis - THÔNG ĐÀ LẠT