Woodruff

Plant identification and tree identification are quite different from each other. There are only around 33 different native species of tree in Britain which is vastly less than the amount of plants there are. This already makes it much easier to identify trees rather than plants. Tree identification (here you can find a good guide to tree identification) is easier because you have 6 main different means of identifying a tree. Leaf, bud, bark, fruit, leaf arrangement and flower. To identify plants you need to have a lot more expert knowledge compared with tree identification.

Take this plant for instance. This is Woodruff (Galium odoratum) gave me a lot of trouble when i was trying to identify this flower. I came across the leaves and they looked like the above. There were a few of these leaves scattered around on the floor and i could not find them in my plant book. So i had to wait a couple of months for it to flower so i could actually identify it properly.
But when it did flower in mid to late spring it was well worth it. From the few scattering leaf formations a couple of months before, it transformed into dozens upon dozens of circular leaf arrangements with white flowers coming off a stems in the centre. It felt really really good to nail that ident.