161 
INDEX OF FAMILIES AND GENERA. 
Abutilon 
Acalypha 
Acanthaceae . . . 
Acer 
Acerates 
Achillea 
Acnida 
Acorus 
Actaea 
Actinomeris . . 
Actinomeris . . . 
Adiantum 
Adlumia 
Agrimonia 
Agropyrum .. . . 
Agrostemma . 
Agrostis 
Aletris 
Alisma 
Alismaceae .... 
Allium 
Alnus 
Alopecurus 
A Isine 
Alyssum 
Amarantaceae , 
Amarantus .... 
Amaryllidaeeae 
Ambrosia 
Amelanchier. . . 
Ammannia 
Ammophila 
Ammophila . . . 
Amorpha 
Ampelopsis 
Amphicarpaea . . 
Anacardiaceae . 
Anacharis 
Anaphalis 
Andropogon . . . 
Anemone 
SYNONYMS IN ITALICS. 
PAGE. 
...22 
. . .102 
...90 
...25 
..79 
...66 
....96 
. . .120 
... 6 
...65 
...65 
. . . 149 
... 8 
...36 
. . . 146 
...18 
...142 
...113 
. . .121 
...121 
. . 115 
, .105 
...142 
...18 
.. 11 
... 96 
...96 
..114 
.. 61 
.. 38 
.. 41 
. . . 143 
..143 
.. 29 
.. 25 
.. 32 
.. 26 
..110 
.. 60 
..140 
. . 1 , 3 
Anemone 
Anemonella 
Angelica 
Antennaria 
Antennaria 
Anthemis 
Anychia 
Aphyllon 
Apios 
Aplectrum 
Apocynaceae . . . 
Apocynum 
Aquilegia 
Arabis 
Araceae 
Aralia 
Araliaceas 
Archangelica . 
Archemora 
Arctium 
Arctostaphylos . 
Arenaria 
Arethusa 
Argemone 
Arisaema 
Aristida. 
Aristolochiaceae 
Artemisia ...... 
Asarum 
Asclepiadaceae . . 
Asclepias 
Asparagus 
Aspidium 
Asplenium ... . 
Asprella 
Aster 
Astragalus 
Atriplex 
Azalea 
Azolla 
PAGE. 
2 
2 , 5 
....... 43 
60 , 89 
60 
66 
96 
89 
32 
110 
78 
78 
5 
10 
120 
46 
46 
43 
....... 44 
68 
75 
18 
Ill 
8 
.120 
.. .....141 
101 
67 , 89 
101 
78 
78 
115 
150 
150 
...... 147 
56 , 84 , 154 
29 
97 
75 
152 
