Index to Orders and Genera. 



PAGE. 



Abies '. .... 132 



Abutilon 17 



Acalypha Si 



Acauthaceae 70 



Acer 21 



Achillaea 53 



Acorus 103 



Actaea 5 



Actinomeris 52 



Adlumia 8 



iEsculus 21 



Agrimonia 31 



Agropyrum 130 



Agrostis 125 



Ailauthus 19 



Aira 125 



Alisma 103 



Alismacese 103 



Allium 97 



Alnus 85 



Alopecurus 123 



Alyssutn 9 



Amarantus 75 



Amarantacese 75 



Amaryllidacese 97 



Ambrosia 51 



Amelanchier 33 



Ampelopsis 21 



Amphicarpsea 26 



Anacardiacese 22 



Anacharis " " 93 



Anagallis 61 



Anaphalis 50 



Andromeda 5S 



Andropogon 122 



Anemone 1 



Anemonella 2 



Antennaria 50 



Anthemis 52 



Anthoxanthum 123 



Anychia 75 



Apbyllon 69 



Apios 26 



Aplectrum 93 



Apocynacese 62 



Apocynum 62 



Aquifoliacese 19 



Aquilegia 4 



Arabis 10 



Aracese 102 



Aralia 41 



Araliacese 41 



Archangelica 40 



Arctium 53 



Arctostaphylos 58 



Arenaria 16 



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Arethusa 94 



Arisaema 102 



Aristolochia 79 



Aristolochiaceae 79 



Artemisia ■ • 53 



Asarum 79 



Asclepias 62 



Asclepiadaceae 62 



Asparagus 9S 



Asperugo 65 



Asprella 130 



Aster 48 



Astragalus 24 



Atriplex 76 



Avena .... • 126 



Azalea 59 



Baptisia 22 



Bartonia 63 



Barbarea 11 



Bellis 48 



Berberidaceae 6 



Berberis 6 



Betula 85 



Betulaceae 85 



Bidens 52 



Bignoniacese 70 



Blephilia 73 



Blitum 76 



Bcebmeria 82 



Borraginacese 64 



Borrago 65 



Brachyetytrum 124 



Brasenia 7 



Brassica 11 



Bromus 129 



Brunella 73 



Buchnera 68 



Calamagrostis 125 



Calamintha 72 



Calla 102 



Calli trichaceae Si 



Callitriche 81 



Calopogon 94 



Caltha . . . . • 4 



Calystegia 66 



Camelina 12 



Campanula 57 



Campauulaceae 56 



Cannabis , .83 



Capparidacese 12 



Caprifoliacese 42 



Capsella 12 



Cardamine 10 



Carex no 



Carpiuus 85 



Carum 39 



