CONTENTS 



PAGE 



PREFACE . . . '. . '. v 



GLOSSARY xxv 



GENERAL KEY TO THE FAMILIES . xxxiii 



ADDER'S-TONGUE FAMILY . . ' ." i 

 FERN FAMILY . . . . .3 

 HORSETAIL FAMILY .... 14 

 CLUB-MOSS FAMILY . . V" . . 18 

 SELAGINELLA FAMILY . . . . 22 

 PINE FAMILY . . . . -23 

 YEW FAMILY .... V" r 34 



ARUM FAMILY 35 



BUNCH-FLOWER FAMILY . . . 36 

 LILY FAMILY . . . 41 



LILY-OF-THE-VALLEY FAMILY . . 45 



IRIS FAMILY . . . V 1 . 52 



ORCHID FAMILY -.- . ' ; ; ;/ '. : v 53 



