THE ORIGIN 
OF A 
LAND FLORA 
A THEORY 
BASED UPON THE FACTS OF ALTERNATION 
BY 
P.O, BOWER, Sc.D, PLR, 
REGIUS PROFESSOR OF BOTANY IN THE UNIVERSITY OF GLASGOW 
WITH NUMEROUS ILLUSTRATIONS 
MACMILLAN AND CO., LIMITED 
ST. MARTIN’S STREET, LONDON 
1908 
