X CONTENTS 



XXII. Applications of Botany 246 



Agronomy — Horticulture — Forestry — Plant Breeding — 

 Bacteriology — Plant Pathology — Pharmaceutical Botany 

 — Agricultural Plants — Ancient Agriculture in America 

 — Plant Improvements. 



PART III 



XXIII. Principles of Classification 257 



XXIV. Thallophytes — The Alg^e 260 



XXV. Thallophytes— The Fungi 273 



XXVI. Beyophytes 289 



XXVII. Pteridophytes , 297 



XXVIII. Spermatophytes 303 



XXIX. Monocotyledones 312 



XXX. Dicotyledonous Plants 331 



