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Lignum vitae is hard and durable, and is also the densest wood traded (average dried density: ~79 lb/ft 3 or ~1,260 kg/m 3); [4] it will easily sink in water. On the Janka scale of hardness, which measures hardness of woods, lignum vitae ranks highest of the trade woods, with a Janka hardness of 4,390 lbf (compared with Olneya at 3,260 lbf, [5] African blackwood at 2,940 lbf, hickory at 1,820 ...
Xanthostemon verdugonianus is known to be the hardest Philippine hardwood species. Cutting a 70-cm thick tree with axes normally requires three hours, but cutting a Mangkono tree with the same diameter usually takes two to four days. Diamond-point saws have been used exclusively but a great volume of water is needed to counter overheating. [1] [6]
The hardest hardwoods are much harder than any softwood, [4] but in both groups there is enormous variation with the range of wood hardness of the two groups overlapping. For example, balsa wood, which is a hardwood, is softer than most softwoods, whereas the longleaf pine , Douglas fir , and yew softwoods are much harder than several hardwoods.
Moderately hard, teak is durable and fire-resistant. It can be easily seasoned and worked. It takes up a good polish and is not attacked by white ants and dry rot. It does not corrode iron fastenings and it shrinks little. It is among the most valuable timber trees of the world and its use is limited to superior work only. Toon, Red Cedar [20]
The medium to large tree [2] has a sparse, semi-deciduous canopy of grey-green leaves. The twigs and leaves are hairless as the name imberbe suggests. Its heartwood is dark brown, close-grained, and very hard and heavy, as suggested by its vernacular name. [3] The durable hardtwood is much sought after in the woodcarving industry.
The glabrous tree grows up to 15 to 18 metres (49 to 59 ft) high, with short horizontal branches and pendulous branchlets covered in needle-like phyllodes adapted for the arid climate. It has a distinctive habit more similar to that of a sheoak or a conifer. [4] The wood is extremely hard and dense with dark purple-coloured heartwood.
"Trees are many things in our climate-fragile world: shields, indicators, educators, and managers," writes Daniel Lewis. ... The Quiet Work Trees Do for the Planet. Daniel Lewis. March 11, 2024 at ...
Each of the trees in this stand is a genetically identical male that has reproduced vegetatively. Although no single tree in this stand is of that age, the stand itself as a single organism has existed that long. [119] Individual trees in the clonal patch have been listed as having ages of 2000 [120] [121] or even to 3000 years old. [122] [123]
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