Although there are some marvellous online resources for wildflower finding on the go, my favourite approach is to use my phone to take a snapshot; the zoom feature can show you things like ridges in the stems, hairs on the surface and other features that help with identification. A hand lens (pictured) is a great tool to keep in your pocket, although they do vary in price. The basic 10x magnification is a good start. Using my favourite books to look at what I have (over a cup of tea) when I get home is most enjoyable. As time passes I have been able to recognise the plant family, even with my limited experience.
Field guides are a good thing to take on a family outing. I have included two wildflower gardening books, as there is no such thing as a weed.
Latin plant names are not as difficult as you think - please dip into the subject! The excellent RHS book "LATIN FOR GARDENERS" is fascinating (ISBN 9781784725051) and far better than the dry old school stuff.
NEW! RESOURCES FOR WILDFLOWERING! Excellent resources from those in the know, for residents, teachers, scouting and guide groups... anybody looking to make life perfect for pollinators and pretty for people! Includes a case study from the Bookham Blue Hearts' wildflowering project in Surrey. We will add resources as they are created.
RESOURCES HOMESURREY'S WILDFLOWERING PROJECT is a community-led initiative, aiming to build a partnership that enables wildflowering in the county as well as promoting and celebrating the boroughs/districts diverse environments. Do take the time to find out more about the project and if you can get involved, even in a small way, you will make a difference.