Dandelions are evil little flowers

My eyes get itchy, and eventually get pink.
I'm sneezing 3 times in a row,
And to top it off, I've got a runny nose.
When will this end?

Well, since I'm talking about dandelions anyways, I've always wondered what exactly are dandelions? I know for a fact that their the flowers that are on the fields during late spring to summer... but are they the yellow ones, or the puffy white ones?
I remember passing through the park near my house one day, and surprisingly, I didn't recognize it at first because it was covered with thousands and thousands of yellow dandelions. The field was sploshed with them. There were patches and patches of them everywhere. I couldn't believe my eyes. And the funny thing was that the field was completely green the day before... Like, their pretty and all, but I'd prefer looking at them from afar. I kinda frighten of them.