How do you tell the difference between Purple Meadow-rue and Waxyleaf Meadow-rue? You crush the leaves and sniff them! As noted botanist Scott Namestnick says:
” If you crush the leaves of T. revolutum (Waxyleaf Meadow-rue) and smell them, you’ll know that’s what you have. They have a distinctive, disgusting, body odor-like smell. I nearly gag when I smell it, and I’m getting nauseous even thinking about it.”
That sure is a lot easier than looking for glandular hairs underneath the leaf. What is a glandular hair anyway?! I suppose it’s a hair that looks like a gland.