Poplar ("poppler") is a soft wood, like pine, and thus doesn't produce a lot of heat when burned. If well seasoned it will burn quickly and well in most stoves. Unlike pine, which contains a lot of resin which will deposit dangerous creosote in your chimney if burned slowly, well-seasoned poplar is relatively clean-burning. Hard woods such as maple, oak, cherry, etc. will provide more heat per volume of wood.
Yes, elm is a very good wood to burn. Like any hard wood, make sure it is seasoned for 1 year.
No it is not safe to burn it.
YES!!! burns very nice and has a lovely aroma
Not the best wood. Rapid burn, rapid burn out, very high creosote production- if used other than as kindling, be sure to clean your chimney OFTEN.
Not a good idea. Some varieties of sumac contain the same toxic chemical as poison oak.
Yes: it is a relatively soft wood, so it may burn hot and fast.
Provided it has been seasond for a full year (open to air bit not rain) it will be fine.
Drift wood can be used in a wood burning stove. It is not as efficient as other aged wood but it will burn. Drift wood is often collected on beaches to have bon-fires. Any wood that has been in the ocean will destroy your stove in a matter of months. I sell wood stoves. A fellow brought in his stainless steel baffle from a stove that he purchase from us less than 6 months earlier. He had been burning wood that had been in the ocean. I could literally crumble it in my hand.
My experience with burning sycamore has not been good. It refuses to burn when even slightly green and burns like paper after it has been seasoned.
A wood pellet stove is simply a wood stove. However it's specialized to burn wood pellets which are made from compressed sawdust and are more convenient than firewood.
Yes. Very hard to split, not the BEST wood, but not the worst either.
No. You need the grate in for air circulation around the burning wood.