I didn't know that there was only one type of dandelion flower until about a year ago (I just turned 30). I always thought that there were yellow ones, and then there were those white, fluffy, puff-ball ones. I was in complete disbelief when my husband told me they were the same flower just different stages of growth. I still have a hard time believing this. I mean, I've never seen a half-yellow/half-fluffy one....
A childhood belief about plants

others believed things like this
- when i was young i thought god was a cloud, big white fluffy cloud floating around with 2 eyes and a smile. — kerrie
- I used to believe that your belly button was what held your top half to your bottom half...— Debelouwho
- When I was little I thought that a "wallflower" was a kind of flower that grew on walls.— A. Nonny-Muss
- i used to believe that a perrenial was a particular flower's name— Ducki
- I thought that kids' pee was yellow and adults' pee was clear.— Aretia
- when i was4 and a half i thought i would be 5 feet in kindergarten— Katrina S.