After reading [this question][1], I went and tried it; and, while it worked, I can't find a use for them. I can't sell them at the Item Check, and I tried poring them out, and it makes a yellow dust, but I don't know what that does.

I did the one quest after completing the third dungeon where

>! That one lady needs them to heal her Loftwing,

but

>! her brother gives you some with a free bottle, and as far as I know, my Loftwing can't get hurt.

What is their use?


  [1]: http://gaming.stackexchange.com/questions/37916/how-can-i-pick-up-the-mushroom-spores-from-the-mushrooms-in-the-forest