CONTENTS. ix 



TRILLIUM {Trillium recurvatum). 



Preliminary, - 197 



Laboratory work, 198 



Annotations, - 215 



SHEPHERD'S PURSE (Capsella Bursa-pastoris). 



Preliminary, - 222 



Laboratory work, - 223 



Annotations, - 236 



GLOSSARY, - - 243 



INDEX, - - 251 



