 Giseke made notes of Linnaeus' lectures and published them in 1792 as "Praelectiones in Ordines Naturales Plantarum".The book included an illustration "Tabula genealogico-geographica affinitatum plantarum secundum ordines naturales Linnaei" which showed the affinities of the families in a form similar to a geographical map.It included circles for families with the size indicating the number of genera contained.