My most recent eight new species have all come from close to home, in fact actually in my home for one of them.
Last year I noticed a plant on a nearby road verge, with yellow flowers and four petals, and spent some time trying to work out what sort of crucifer it was, but failed to come up with a satisfactory ID. It's flowering in the same place this year, and I again spent some time puzzling over the crucifer (cabbage family) pages, before it struck me that the leaves looked a bit like a poppy. So I tried the poppy family instead, and there it was - Greater Celandine ...