...nor thorns infest the ground." (lyrics from "Joy to the World")
These are "Goat Head" stickers. We have about a million of them by our house. My son went out to water the roses and came back inside with 186 stickers in the bottoms of his flip-flops!! We are constantly stepping on them in the house!
When Adam and Eve sinned (read Genesis 3), one of the results of that fall was that thorns would infest the ground. You're not kiddin!
I look forward to the day when the rest of that verse is true... "He comes to make His blessings flow far as the curse is found!"