Recent floristic and phytosociological survey-techniques used in the Netherlands are reviewed by the authors. The particular combination of techniques, used in the investigation of the province of Utrecht, is discussed. A floristic inventory is made of separate habitats in everyone of the kilometer squares; these separate lists are then combined to give a total inventory of 1 kilometer square comparable to the method of MENNEMA (1973). The frequency of each species in the various habitats is also given. Also a phytosociological inventory is made and a new system of mapping the vegetation-units is introduced.