COLOURED ILLUSTRATIONS 



FACING PAGE 



PRUNUS MARITIMA . . Frontispiece. 



CYPRIPEDIUM ACAULE 39 



SAPONARIA OFFICINALIS 93 



TEPHROSIA VIRGIXIANA . .... 160 



CENOTHERA MURICATA 253 



GERARDIA PURPUREA 350 



LIATRIS SCARIOSA 366' 



ASTER XOVI-BELGII 391 



xlv 



