Dipterocarpus alatus
Dipterocarpus alatus
Dipterocarpus alatus is a species of the genus of the two wings fruit trees ( Dipterocarpus ) within the family of wing fruit plants ( Dipterocarpaceae ). This endangered species is native to tropical Asia and the wood is used.
- 6.1 Notes and references
Description
Vegetative characteristics
Dipterocarpus alatus grows as a medium to large evergreen tree, (sometimes more) achieved the stature heights of usually up to 40 meters and trunk diameter of up to 1.50 meters. The straight, cylindrical trunk is free of branches to a height of about 20 meters.
The alternate arranged on the branches leaves are stalked 2.5 to 4.5 cm long. The leaf blade is at a length of 9 to 25 cm and a width of 3.5 to 15 cm, narrowly ovate, ovate to elliptic -oblong with rounded wedge-shaped to Spreitenbasis and pointed vaguely short tapered at the top. There are 11 available to 18 ( up to 20) pairs of lateral nerves. The Leaves are sparsely hairy fluffy and the lower leaf surface is permanently covered with dense hair fluffy. The stipules are hairy grayish - yellow fluffy.
Generative features
The relatively large, fragrant hermaphrodite flowers are radial symmetry and fünfzählig double perianth. The five sepals are durable, Roehrig adherent to the ovary, but not with him. There are two long, oblong to spatulate, more or less distinctly three annoying and three short calyx lobes present, or sometimes are all short. It is. The five relatively large, oblong to narrowly - oblong petals are strongly twisted and hanging out together at the fall loosely. The creamy white petals have showy red, pink or purple strip to the center of the flowers.
The nut fruits are surrounded by tough, bald, with a diameter of up to 8 mm, almost spherical cup. This fruit calyx has five wings, two of which are up to 14 cm long and up to 3 cm wide and three up to 12 mm long and up to 14 mm wide.
Occurrence and risk
The distribution area of Dipterocarpus alatus is in tropical Asia: Andaman Islands, Assam, Bangladesh, Thailand, Cambodia, Myanmar, Vietnam and has been since recognized that even Dipterocarpus philippinensis is only a synonym, the Philippine island of Luzon. It occurs mainly in Southeast Asia. Dipterocarpus alatus comes mainly at altitudes between 0 and 500 meters on alluvial ago and is located in evergreen and dry deciduous hardwood forests. In Indo- China and Thailand Dipterocarpus alatus sociable thrives along river banks. In Philippines it is one species in dipterocarp forests.
In the Red List of Threatened Species IUCN Dipterocarpus alatus is as " Endangered " = " high risk " out.
Taxonomy
The first description of Dipterocarpus alatus was made in 1831 by William Roxburgh in George Don: A General History of the Dichlamydeous Plants, 1, pp. 813 homonyms are Dipterocarpus alatus A.DC. (published in Prodromus systematis Naturalis Regni Vegetabilis, 16 ( 2), 1868, p 611 ) and Dipterocarpus alatus Roxb. (published in Hortus bengalensis, or a catalog ... II, p 614). The specific epithet means alatus winged and refers to the fruit.
Dipterocarpus alatus Roxb synonyms for. ex G.Don are: Dipterocarpus gonopterus Turcz, Dipterocarpus philippinensis Foxw. .
Use
Dipterocarpus alatus is one of the most important timber species of the genus Dipterocarpus and delivered in Thailand in addition to teak one of the most important timber species.
For example, from the Thai countries, the resin is recovered. This oleoresin is used to make for illuminating and around baskets and boats water repellent. Today, the oleoresin is used for the production of paints and varnishes. The annual production by tapping a tree is 23 to 31 liters of oleoresin.
Others
The dust of Dipterocarpus alatus causes bumps.
Swell
- Datasheet - Dipterocarpus alatus in AgroForestryTree Database. (Section Description, occurrence and use)