1 Pico Wood
The wood of the Pico tree has a very sweet smell as it burns, and as a result it is often used to build funeral pyres with, as that way the mourners don't have to smell the stench of burning flesh. It has also been used by those who practise burial as well. If the body for whatever reason is decomposing before it has been buried, then a Pico wood coffin will contain the foul smell of death with it to protect the nostrils of the mourners.
2 Wajji Wood
Have you ever wondered what kind of wood magic wands are made from? The Wajji trees are quite rare and grow on former battlefields of the past where large amounts of wild and destructive battle-magic were once cast. Whilst other woods can be used to cast magic, they ignite and burn away after one or two uses, much like The Sword of Fire . A well looked after Wajji wand on the other hand will last for centuries and cast any spell without burning. As you might imagine, you need a special license to cut down or otherwise harvest from a Wajji tree, and they are guarded against poachers.
3 Steel Wood
Steelwood trees are very hard to cut down and to work with, and they are often used for clubs, batons, jagged wooden swords and other such weapons of war. With enough force, a jagged blade of this wood will cut as well as if it were made of flakes of obsidian, whilst a club or baton is almost guaranteed not to break over anybody's head. The Icyou tribe of orcs lives in a metal poor area and carries Steelwood weapons instead of metal weapons, and are perfectly able to raid places or to defends themselves if attacked.
4 Greater Balsa Wood
The Greater Balsa Wood trees are huge-it just takes two of them to make an entire three masted galleon and five of them to make a seven masted dreadnought, and they float in water and burn only slowly. This means that if they take damage in battle from cannon balls, shrapnel or even shells they can float even with large holes in the hull. Storms cannot sink them, although if the waves are big enough and strong enough and strike at an angle there is a danger of flipping the ships over, so they are best left in port in a hurricane or typhoon. Whilst they are not fireproof, fire spreads slowly and can be put out if water is put on it quickly enough, so ships made of Greater Balsa Wood trees are less flammable then other ships.
5 Stink Wood
When burned, wood from the Stinkwood tree stinks and the smoke causes skin to blister and can even cause blindness if enough of it gets in the eyes. It has been used in the past as a chemical weapon on the battlefield, and in one case was used to help deal with a rebel army that had taken cover in a cave system. As noone would use it for cooking or to heat their homes, forests of Stinkwood trees are more likely to avoid being cut down.
6 Decay Wood
The wood of the Greenwood tree rots within three years after being cut down. Traditionally used for coffins, it is also used for houses that are sold for far less of a price then normal houses are sold for. Normally, with a Greenwood house, the land under it is in effect rented for three years at a time. When the house starts falling apart, the owner must either buy a new Greenwood house or move on. Large buildings and forts are not made of Greenwood, the first because it would be dangerous and the second because it would not be any good to defend an area in the long term.
7 Fire Wood
Flamewood trees go on fire very easily, to the point where they are useful for funeral pyres and firewood in general and not much else. A house of Flamewood would be a health hazard, as even when painted and treated it would be very easy to set it on fire in hot dry weather with not much more then a match. The Flamewood seeds need fire to make them germinate and grow, and after a forest fire, within a year the new Flamewood saplings are already growing.