[ She watches him, almost a little too amused - really, she shouldn't find this so completely precious but... It's Merlin, this great, historical figure, smelling a plant to work out if it's poisonous or not. It would be comical if it wasn't so sweet. ]

Then it's probably closer to yarrow. I could come and take a look, if you wanted?

[ She hesitates; she isn't entirely sure how comfortable with her Merlin is, all things considered... But she might as well offer. What could go wrong with a simple offer? ]

I could cast a few charms to see if they're poisonous, at least.