Dream Catchers

You move back a little way, and then run towards the fence. Just as it looks like you are about to run into it, you execute a flying leap, and sail right over the top of the fence.
You find a piece of paper with a riddle on it:
"I stand tall upon green legs,
A white head have I,
My scent is sweet,
My spears will pierce if you do not take care,
For innocence, and purity, and love I stand."
You have four options.