In message , K
writes

It interests me our different approaches - you via the detailed
botanical structure, me by my gut feeling and similarities to things I
already know well. You will, of course, always get to the correct
answer while I can go spectacularly wrong, but just occasionally I may
get there more quickly albeit less rigorously.

There's a plant growing in walls in the main road through the town which
last year I thought was a labiate (clusters of flowers in the nodes). I
didn't look into it in detail as I also mistakenly thought that it was a
cultivated plant.

Turns out that it's pellitory-of-the-wall (Parietaria judaica), and is
growing wild. Today's other new record for the town is dwarf mallow
(Malva neglecta).

So you're not the only one who can go spectacularly wrong. (On the other
hand I can sometimes identify on sight plants that I'd never knowingly
seen before, such as moschatel.)
--
Stewart Robert Hinsley