Difference between revisions of "Hopea nutans (PROSEA)"
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<big>''[[Hopea nutans]]'' Ridley</big> | <big>''[[Hopea nutans]]'' Ridley</big> | ||
__NOTOC__ | __NOTOC__ | ||
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:Protologue: Fl. Mal. Pen. 1: 235 (1922). | :Protologue: Fl. Mal. Pen. 1: 235 (1922). | ||
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== Observations == | == Observations == | ||
| − | A medium-sized tree of up to 30 m tall, bole often gnarled and comparatively short, with a diameter of up to 70 cm and short buttresses, bark surface shaggily scaly, dark brown, inner bark yellow, sapwood yellowish, heartwood yellow when fresh, deep tan or red-brown on exposure; young parts very shortly sparsely pale brown pubescent | + | *A medium-sized tree of up to 30 m tall, bole often gnarled and comparatively short, with a diameter of up to 70 cm and short buttresses, bark surface shaggily scaly, dark brown, inner bark yellow, sapwood yellowish, heartwood yellow when fresh, deep tan or red-brown on exposure; young parts very shortly sparsely pale brown pubescent. |
| + | *Leaves broadly ovate, 8-13 cm × 4.5-8.5 cm, leathery, greyish lepidote below in mature trees, base obtuse, acumen up to 1 cm long, margin frequently revolute, venation scalariform, midrib slightly raised above, secondary veins 7-10 pairs, curved at 50-60°, distinct. | ||
| + | *Stamens 15, in 3 subequal whorls, ovary and stylopodium subcylindrical, glabrescent, style short. | ||
| + | *2 longer fruit calyx lobes up to 8 cm × 1.5 cm, oblong, thinly leathery, obtuse, 3 shorter ones up to 10 mm long, acute. | ||
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| + | ''H. nutans'' occurs on sandy soils, often periodically inundated, near and on coastal hills. The density of the wood is 875-1205 kg/m<sup>3</sup> at 15% moisture content. See also the table on wood properties. | ||
== Selected sources == | == Selected sources == | ||
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30, 89, 100, 102, 258, 297, 359, 417, 476, 514, 677, 748. | 30, 89, 100, 102, 258, 297, 359, 417, 476, 514, 677, 748. | ||
| + | == Main genus page == | ||
| + | |||
| + | *[[Hopea (giam) (PROSEA)|''Hopea'' (giam)]] | ||
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| + | == Authors == | ||
| + | |||
| + | *K.M. Kochummen (selection of species), | ||
| + | *F.T. Frietema (selection of species) | ||
[[Category:Timbers (PROSEA)]] | [[Category:Timbers (PROSEA)]] | ||
[[Category:PROSEA]] | [[Category:PROSEA]] | ||
Latest revision as of 19:07, 3 August 2017
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Introduction |
Hopea nutans Ridley
- Protologue: Fl. Mal. Pen. 1: 235 (1922).
Vernacular names
- Brunei: garang buaya daun kechil
- Malaysia: giam, chengal batu (Peninsular), giam betul (Sabah, Sarawak).
Distribution
Peninsular Malaysia and Borneo.
Uses
The timber is used as high-grade giam, notably for keels and external planking for boats, long piles (sapwood treated), floors and heavy construction. An opaque, yellow resin can be tapped from the tree.
Observations
- A medium-sized tree of up to 30 m tall, bole often gnarled and comparatively short, with a diameter of up to 70 cm and short buttresses, bark surface shaggily scaly, dark brown, inner bark yellow, sapwood yellowish, heartwood yellow when fresh, deep tan or red-brown on exposure; young parts very shortly sparsely pale brown pubescent.
- Leaves broadly ovate, 8-13 cm × 4.5-8.5 cm, leathery, greyish lepidote below in mature trees, base obtuse, acumen up to 1 cm long, margin frequently revolute, venation scalariform, midrib slightly raised above, secondary veins 7-10 pairs, curved at 50-60°, distinct.
- Stamens 15, in 3 subequal whorls, ovary and stylopodium subcylindrical, glabrescent, style short.
- 2 longer fruit calyx lobes up to 8 cm × 1.5 cm, oblong, thinly leathery, obtuse, 3 shorter ones up to 10 mm long, acute.
H. nutans occurs on sandy soils, often periodically inundated, near and on coastal hills. The density of the wood is 875-1205 kg/m3 at 15% moisture content. See also the table on wood properties.
Selected sources
30, 89, 100, 102, 258, 297, 359, 417, 476, 514, 677, 748.
Main genus page
Authors
- K.M. Kochummen (selection of species),
- F.T. Frietema (selection of species)
