I maybe shouldn't admit it Raggy but I'm pretty poor. I got stumped on yarrow in my strimming the other day... Mum is much better and instantly gave me the name and also a vetch I brought in... But her mother by local reputation was the one. She was supposed to have names (I guess in some cases local) of "everything" that grew in her Shropshire borders village and where to find them... When not busy as postmistress, it sounds like it was a big part of her life that she grew up with.