INTRODUCTION, 
GEOGRAPHIC DIsTRIBUTION, 
GENERAL MorPHOLOGY, . 
ANATOMY OF THE STEM, . 
GENERAL ANATOMY, .... . 
PALAEONTOLOGY, 
PoLyGonumM, 
Subgenus Bistorta, . 
Subgenus Aconogonon, 
Subgenus Persicaria, . 
Subgenus Amblygonon, 
Subgenus Tovara, 
Subgenus Avicularia, 
Subgenus Durayia, . . 
Subgenus Tiniaria, 
Subgenus Echinocaulon, . . 
DESCRIPTIONS OF THE SPECIES, . 
CoMPARATIVE ANATOMY, 
CONTENTS. 
PAGES, 
5-8 
8 
8-12 
13 
12-14 
14-15 
17-18 
19-20 
20 
20-22 
22 
: a 
23-24 
25 
25-26 
26 
28-164 
. 165-178 
