So as ever, when everything else fails I turn to google. I found this site - English Wildflowers, a Seasonal Guide - and I had a good look round.
While I was trying to find the right plants to add to a descriptive passage in 'Digging up the Past' I found a small entry called 'Chickweed Willowherb'. I had a bit of a look out of curiosity and I found a plant that I had known from childhood as a very common weed that was easy to pull up when weeding and that had pretty flowers.
picture by martinjohnbishop and posted on iSpot
So while I've known what this plant looks like since I was old enough to toddle, I only now know its name. I probably won't drop it into the middle of a block of description, but I will remember it.
Interestingly enough, as I was looking for a picture for this I found a site called iSpot, which has all sorts of nature sightings and records just sent in by the public. I found a few bits that were local to me. So I learned even more.
It's been a good day, I love learning new things.