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Hardwood is wood from angiosperm trees. These are usually found in broad-leaved temperate and tropical forests . [ 1 ] In temperate and boreal latitudes they are mostly deciduous , but in tropics and subtropics mostly evergreen .
A walnut is the edible seed of any tree of the genus Juglans (family Juglandaceae), particularly the Persian or English walnut, Juglans regia. They are accessory fruit because the outer covering of the fruit is technically an involucre and thus not morphologically part of the carpel; this means it cannot be a drupe but is instead a drupe-like nut.
For hardwood flooring, the test usually requires an 80 mm × 150 mm (3 in × 6 in) sample with a thickness of at least 6–8 mm, and the most commonly used test is the ASTM D1037. When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ...
Juglans regia, the common walnut [1] or Persian walnut [2] amongst other regional names, is a species of walnut.It is native to Eurasia in at least southwest and central Asia and southeast Europe, but its exact natural area is obscure due to its long history of cultivation.
Queensland walnut (Endiandra palmerstonii) Ramin (Gonystylus spp.) Redheart, chakté-coc (Erythroxylon mexicanum) Sal (Shorea robusta) Sweetgum (Liquidambar styraciflua) Sandalwood (Santalum spp.) Indian sandalwood (Santalum album) Sassafras (Sassafras albidum) Southern sassafras (Atherosperma moschatum) Satiné, satinwood (Brosimum rubescens) [9]
Hardwood from North American trees has a variety of commercial uses, including in furniture, carpentry, tools and musical instruments. Some timber is milled for plywood , wood veneer and construction framing , including structural support beams and studs .
The wood from conifers (e.g. pine) is called softwood, and the wood from dicotyledons (usually broad-leaved trees, e.g. oak) is called hardwood. These names are a bit misleading, as hardwoods are not necessarily hard, and softwoods are not necessarily soft. The well-known balsa (a hardwood) is actually softer than any commercial softwood.
Walnut trees are any species of tree in the plant genus Juglans, the type genus of the family Juglandaceae, the seeds of which are referred to as walnuts.All species are deciduous trees, 10–40 metres (33–131 ft) tall, with pinnate leaves 200–900 millimetres (7.9–35.4 in), with 5–25 leaflets; the shoots have chambered pith, a character shared with the wingnuts (Pterocarya), but not ...