Answer:
I run smoother than any rhyme I love to fall but cannot climb.
I am flora not fauna. I am foliage not trees. I am shrubbery not grass.
I am the minerals vital for your good health.
I wear a red robe, with staff in hand and a stone in my throat. What am I?
You use a knife to slice my head and weep beside me when I am dead.
Brings the sky a lot closer.