Shorea obtusa
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| Wall. ex flower |
Shorea obtusa is a species of the genus Shorea within the wing fruit family(Dipterocarpaceae). It is native to Southeast Asia .
description
Shorea obtusa grows as a tree up to 30 meters high . The trunk gives off a light yellow resin ( dammar ), the bark is heavily tannic .
The short-stalked and leathery leaves are ovate to elliptical or elongated and pointed to indented. There are small stipules present.
There are grape-like formed inflorescences, the five petals with a double perianth are sitting. The inner and outer sepals are different. The light yellow flowers have no nectar . The many, basal fused stamens are arranged in 3 circles. They are of different lengths in each circle, the innermost being the longest and the outermost being the shortest. The anthers are ciliate and with a hairy appendage. The ovary is constantly above a short stylus with a very small, capitate and shared scar .
Winged wing fruits with 3–5 multi-veined and green-red and brownish wings when ripe are formed.
Pollination is done by beetles .
use
The hard and heavy wood of Shorea obtusa is used in many ways.
distribution
Shorea obtusa is found in Cambodia , Laos , Myanmar , Thailand and Vietnam .
Taxonomy
Shorea obtusa was first published by Nathaniel Wallich in Numer. List [Wallich] n. 966, 1829. The first valid description was then made by Carl Ludwig Blume in Mus. Bot. 2 (1-8): 32 (t. 8), 1856, from which the valid name Shorea obtusa Wall arose . ex flower .
literature
- Chadaporn Senakun, Suchitra Changtragoon, Pairot Pramual, Preecha Prathepha: Genetic structure and diversity of Shorea obtusa (Dipterocarpaceae) in Thailand . In: Journal of Systematics and Evolution . tape 49 , no. 2 , 2011, p. 120–125 , doi : 10.1111 / j.1759-6831.2010.00109.x .
- Shorea obtusa in the endangered Red List species the IUCN 2017. Posted by: V. Ly, K. Nanthavong, R. Pooma et al, 2017. Retrieved on October 11, 2018..
- L. Pierre , O. Doin: Flore forestière de la Cochinchine. Vol. 3, Paris 1889, T. 234. ( online at biodiversitylibrary.org, accessed October 11, 2018).
Web links
- Shorea obtusa at Useful Tropical Plants, accessed October 11, 2018.
Individual evidence
- ↑ a b Jaboury Ghazoul: Dipterocarp Biology, Ecology, and Conservation. Oxford University Press, 2016, ISBN 978-0-19-108784-4 , 2: Flowers.
- ↑ IPNI