Clapham, A.R., Tutin, T.G. & Warburg, E.F., 1968
Excursion of Flora of the British Isles
Based on the full "CTW", the Excursion Flora has the same keys, but the descriptions are reduced (or removed altogether for rare species.) Rarer naturalised species, segregates of critical groups (Rubus, Hieracium, Alchemilla, Sorbus, Euphrasia) and most casuals have been completely removed.
||Cambridge University Press (CUP)
||All native species and hybrids known at the time, plus a good selection of the commoner aliens and garden escapes.
||A few line drawings in the glossary.
||In the Hand (also useful to examine with x8 or x10 hand lens).