Flora dels Briòfits dels Països Catalans, Volume 1. Molses covers mosses, and is the first volume in the work as a whole. It will be immediately followed by another volume focussing on hepatics. This flora contains 667 species of mosses, representing 85% of the mosses cited in the Iberian Peninsula and 52% of the European mosses, and contains dichotomous keys for genera and species. For each species, there are differential morphological characteristics, data on ecology, distribution and frequency. The numerous illustrations provided are all original.