Calocedrus macrolepis
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Branch with scaly leaves |
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| Scientific name | ||||||||||||
| Calocedrus macrolepis | ||||||||||||
| Short |
Calocedrus macrolepis is a species of incense cedar ( Calocedrus ). It isnativeto southern to southeastern Asia .
description
Calocedrus macrolepis grows as an evergreen tree that can reach heights of 15 to 25, in exceptional cases up to 40 meters and a breast diameter of 60 to 150 centimeters. The crown is formed by thick branches that descend almost straight from the trunk. It is pyramidal in young trees and becomes broad and rounded with age. The straight trunk often branches when the tree reaches heights of over 10 meters. The grayish-brown to reddish-brown bark is smooth in young trees. In older trees, the bark becomes longitudinally cracked and flakes off.
Knots are clearly visible on the branches; at these nodes there are two large and two smaller opposite leaves. The scaly leaves are 1.5 to 8 millimeters long.
The flowering period extends from March to April. The yellow male cones are egg-shaped to oblong with a length of 4 to 8 millimeters and a diameter of 2 to 3 millimeters. They contain microsporophylls with three to five pollen sacs . The female cones are oval shaped with a length of 1 to 2 centimeters and a diameter of 4 to 6 millimeters. The cones, which ripen in September to December, are reddish brown in color and open into three parts, with the middle part bearing the two winged seeds. The seeds are almost ovate to elliptical in shape with a length of 5 to 6 millimeters.
Occurrence
The natural range of Calocedrus macrolepis extends from northern India over Laos , northeast Myanmar and northeast Thailand to southeast China, as well as areas in Vietnam . In China they can be found in the provinces of Guangxi , Guizhou , Hainan and Yunnan . Whether Calocedrus macrolepis occurs in Guangdong Province is controversial. In Vietnam they can be found on a mountain in the province of Hà Tây , in the province of Khánh Hòa and in the area around the city of Đà Lạt .
Calocedrus macrolepis thrives in humid climates and at altitudes of 300 to 2000 meters. It grows on soils formed on limestone or granite . Calocedrus macrolepis grows in closed or open, evergreen forests at altitudes of more than 900 meters .
Systematics
It was first described as Calocedrus macrolepis in 1873 by Sulpiz Kurz in Journal of Botany, British and Foreign , 11 (127), p. 196, Plate 133, Figure 3. Synonyms for Calocedrus macrolepis Kurz include Heyderia macrolepis (Kurz) HLLi , Libocedrus macrolepis (short) Benth. and Thuja macrolepis (short) Voss .
use
The finely grained wood of Calocedrus macrolepis is easy to work with and is resistant to termite damage . It is mainly used as construction and joiner wood as well as for turning work. Since it gives off an aromatic scent, it is also processed into incense sticks .
Due to its beautiful habit, Calocedrus macrolepis is occasionally planted as an ornamental wood .
Hazard and protection
Calocedrus macrolepis is listed as "endangered" on the IUCN Red List . It is pointed out, however, that a new check of the risk is necessary. The main reasons for endangerment are the heavy logging and the displacement of the forests by arable farming .
swell
- Christopher J. Earle: Calocedrus macrolepis. In: The Gymnosperm Database. www.conifers.org, December 12, 2010, accessed August 20, 2011 .
- Liguo Fu, Yong-fu Yu, Robert P. Adams & Aljos Farjon: Cupressaceae . Calocedrus . In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae . Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 978-0-915279-70-8 , Calocedrus macrolepis , pp. 65 (English, Calocedrus macrolepis - Online ).
Individual evidence
- ↑ a b c d e Liguo Fu, Yong-fu Yu, Robert P. Adams & Aljos Farjon: Cupressaceae . Calocedrus . In: Wu Zhengyi, Peter H. Raven & Hong Deyuan (eds.): Flora of China . Cycadaceae through Fagaceae . Volume 4. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis 1999, ISBN 978-0-915279-70-8 , Calocedrus macrolepis , pp. 65 (English, Calocedrus macrolepis - Online ).
- ↑ a b c d e f g Christopher J. Earle: Calocedrus macrolepis. In: The Gymnosperm Database. www.conifers.org, December 12, 2010, accessed August 20, 2011 .
- ↑ a b Calocedrus macrolepis in the endangered Red List species the IUCN 2011. Posted by: Conifer Specialist Group, 2000. Accessed August 20, 2011th
- ↑ Calocedrus macrolepis at Tropicos.org. Missouri Botanical Garden, St. Louis, accessed August 8, 2016.
