Answer:
Light me up in backyard gatherings
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
I am used when you jump off a bridge for fun.
I am a caribbean shape that makes ships disappear
You use a knife to slice my head and weep beside me when I am dead.
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk