xii ILLUSTRATIONS 



Plate XII 



Camerarius, younger portrait 14 



Plate XIII 



Title-page of the extract from Camerarius' ''De Sexu 

 Plantarum Epistold" 15 



Plate XIV 



Title-page of Valentiris ''Res pons oria' to the Camer- 

 arius Epistola 16 



Plate XV 



Carl von Linne 17 



Plate XVI 



Title-page of the ''Disquisitio de Sexu Plantarum'^ 



of Linnaeus 18 



Plate XVII 



Title-page of the ''Plantae Hybridae" of Johannes 

 Haartman 25* 



Plate XVIII 



Linnaeus' Hybrid^ "Veronica maritima X Verbena 

 officinalis'' 27 



Plate XIX 



J. G. Kblreuter 3^ 



Plate XX 



Sir Thomas Milling ton 63 



Plate XXI 



Philip Miller 67 



Plate XXII 



James Logan 69 



Plate XXIII 



Title-page of SprengeVs ''Das Entdeckte Geheimmss 



der Natur" 79 



