COLOURED ILLUSTRATIONS 



FACING PAGE 



PRUNUS MARITIMA .... Frontispiece. 



CYPRIPEDIUM ACAULE 39 



SAPONARIA OFFICINALIS 93 



TEPHROSIA VIRGINIANA 160 



CENOTHERA MURICATA 253 



GERARDIA PURPUREA 350 



LIATRIS SCARIOSA 366 



ASTER NOVI-BELGII , . . .391 



xlv 



