I'm bringing this old thread back up because I'm wondering whether anybody has learned any new mnemonics during the year.

I have. In a wetlands workshop I learned how to tell sedges from grasses when out in the wilds:

"Sedges have edges and grasses have asses"
(that's because grasses have a hole up the middle)

So, if you've learned a thing or two this year and have a way of remembering it/them, please enlighten us.

If nobody's learned anything, this old thread will turn into a dead thread.