Triomma malaccensis
| Triomma malaccensis | ||||||||||||
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| Systematics | ||||||||||||
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| Scientific name of the genus | ||||||||||||
| Triomma | ||||||||||||
| Hook.f. | ||||||||||||
| Scientific name of the species | ||||||||||||
| Triomma malaccensis | ||||||||||||
| Hook.f. |
Triomma malaccensis is a tree in the balsam family from Malaya to Borneo , Java and Sumatra . It is the only species in the genus Triomma .
description
Triomma malaccensis grows as a very large, evergreen tree over 52 meters high. The trunk diameter reaches a meter or more. Large and often broad buttress roots are formed. The brown-gray bark is relatively smooth and easily flakes off. The tree carries an aromatic resin .
The leaves are imparipinnate with 5–11 leaflets . The papery and entire, pointed leaflets are ovate to elliptical, lanceolate or obovate. The leaflets are 4-15 inches long and 2-6 inches wide. The leaf and leaflet stalks and the rachis are slightly hairy to glabrous. The stipules are missing.
Triomma malaccensis is dioecious diocesan . The multiple branched, axillary or pseudo terminal inflorescences are glandular-hairy. The female inflorescences are smaller. The very small, five-fold, whitish-yellow flowers are double- coated . The free sepals and petals are hairy densely brownish. There are 5 short, often twisted stamens or small staminodes in the female flowers. The Upper permanent bald ovary is dreikammerig with trilobal, almost sitting scar , in the male flowers it is virtually completely reduced. There is a slightly lobed disc .
Three -winged, woody, broad-egg-shaped, pear-shaped wing fruits (pseudocapsule) are formed, which open with three flaps. They contain 3 all around, broadly winged, flat, in outline with wings broadly egg-shaped, pear-shaped seeds (pyrene) with folded, lobed cotyledons . The fruits are 5.5–7.5 inches long and the fruit wings 2–2.5 inches wide. The seed wings are papery-membranous and reticulate-veined.
Taxonomy
The first description of the genus Triomma and the species Triomma malacensis was in 1860 by Joseph Dalton Hooker in Trans. Linn. Soc. London 23: 171. Synonyms are Canarium mahassan Miq. and Triomma macrocarpa (Miq.) Backer ex K. Heyne .
use
The wood is relatively soft, of medium weight and not very durable, it is known as Kedondong , but some other types of wood are traded under this name. It is mainly used indoors.
literature
- CGGJ van Steenis: Flora Malesiana. Ser. I, Vol. 5, 1956, pp. 212, 218f, online at biodiversitylibrary.org.
- K. Kubitzki : The Families and Genera of Vascular Plants. Vol. X: Flowering Plants Eudicots , Springer, 2011, ISBN 978-3-642-14396-0 , pp. 76, 80, 84 f, 89 f, 98 f, online at researchgate.net.
- K. Ogata, H. Abe, T. Fujii, P. Baas: Identification of the Timbers of Southeast Asia and the Western Pacific. Kaiseisha Press, 2008, ISBN 978-4-86099-244-6 , pp. 43, 47.
Web links
- Triomma malaccensis on asianplant.net.
- Triomma on phylodiversity.net (illustrations).