There are some really nice ones out there Lesley. Looking through the wildflower books I think yellow and white are the predominant flower colours over here too and the amount of species is a bit daunting!
I have botanist friends who split into two groups on their walks, one concentrating on terrestrial orchids and the other on helichyrsums and compete as to who can see a greater number of species during the walk. I must say I'd take the orchids any day!