Should I use "but" or "but not" or "not"?
This is a Tree but a Flower.
This is a Tree but not a Flower.
This is a Tree not a Flower.
Which is right or wrong?
This is a tree, but not a flower. = This is a tree, but it is not a flower.
If it's wrong, then, to me, it's wrong only because it's not logical to ordinarily contrast a tree and a flower.
The other sentence you asked about is just wrong. It doesn't make sense. I wouldn't think about that one.