r 
INDEX TO THE GENERA. 
A. 
Agrostis 
42 
Anthoxanthum 
. 45 
Alopecurus 
- 47 
Aristida 
53 
Andropogon 
54 
Aira 
56, 57 
Avena 
69 
Arundo 
70 
Anthopogon 
71 
Agrostis 
40, 41, 44 
Arundo 
44, 45 
Avena 
65 
Aira 
69 
Asprella 
72 
Anychia 
74 
xVndrewsia 
89 
Ammania 
- 91 
Aiiagallis - 
106 
Atropa 
111 
Azalea - 
113 
Ampelopsis - 
118 
Apocynum 
- 129 
Asclepias - 
131 
Ammi 
- 138 
Angelica - 
140 
Atri pi ex 
148 
Aralia 
156 
Allium 
161 
Aletris - 
163 
Acorns 
169 
Anthericum 
174 
Alisma - 
177 
Acer 
184 
Andromeda - 
197 
Alsine 
213 
Arenaria 
213 
Agrostemma 
216 
Agrimonia - 
224 
Aronia 
- 227 
B. 
Briza 
63 
Sromus 
67 
Bignonia - 
9 
Bartonia 
89 
Baptisia 
206 
Balsamona - 
224 
C. 
Callitriche 
2 
Catalpa 
9 
Cunila 
12 
Ctmila 
13 
Collinsonia 
15 
Circsea 
16 
Crypta 
17 
Cyperus - 
26 
Cenchrus 
38 
Cinna 
44 
Calamagrostis 
44 
Crypsis 
45 
Commelina * 
24 
Cyperus 
29 
Cornucopia 
40 
Cynosurus - 
70 
Cephalanthus - 
80 
Cornus 
86 
Centaurella 
89 
Centaurium - 
89 
Cuscuta 
93 
Cynoglossum 
101 
Convolvulus - 
106 
Calystegia - - 106, 
158 
Calydermos 
111 
Chironia - 
113 
Campanula - 
114 
Cissus - 
117 
Ceanothus - 
126 
Celastrus 
127 
Comandra - 
128 
Cortusa 
135 
N» B. The words of the Index in italics are synonymous genera^and are only 
to be found under other generic terms. 
