Since the queen of anastrophe has been with us from the beginning, we are well
acquainted with her. Angiosperms have coverings on the seeds, such as pods on beans, etc. The gymnosperms are literally naked, covered only with a membrane to retain moisture, such as the pines.
As I said before, I think the kids would find knowing the meaning of the words an
indispensable mnemonic. I have always wanted to know etymology as well as an additional mnemonic.