INDEX TO THE GENERA. 



Synonym* in Italic. 



Abies loa 



Abutilon ao 



Acalypha q3 



Acer as 



Achillea 6i 



Aconitum s 



Acorus ii6 



Acroanthes lo:^ 



Acta-a 5 



Adiantum 134 



Adicea v4 



Adlumia 10 



^•'sculus 35 



Agrimonia 37 



Agropyron 133 



Agrostemma 17 



Aerostis 130 



Ailanthus aa 



Alisma 117 



Allium •. 108 



Alnus q7 



Alopecurus lag 



Alsine 18 



Amaranthus 88 



Am brosia SO 



Amelanchier 38 



A tnpelopsis 25 



Aviphicarp^ca 3a 



Anaeallis 73 



Anafhalis 58 



Andromeda' 68 



Andropogon 128 



Anemone i 



Anenionella 2 



Angelica 45 



Antennaria 38 



Anthemis 61 



Anthoxanthum 128 



Anvchia S8 



Aph\Uon 83 



Apios _u 



Apocynum 74 



A quilegia 5 



Arabis 11 



Aralia 48 



A rceutliobium ga 



Arctium 6a 



Arenaria 17 



Arisiema 115 



Aronia 38 



Artemisia 6j 



Avarum 91 



Asclepias 74 



A sparagus loq 



Aspidiiim 137 



Asplenium 135 



Asprella 133 



I'AOE 



Aster 56 



Astragalus 30 



Atragene i 



Atiiplex Sg 



Avena 130 



A /.alea '>j 



Baptisia a8 



Barbarea la 



Batrachmm 3 



Benzoin 92 



Berberis 7 



Betula 9/^. 



Bicuculla 10 



Bidens 61 



Blephilia 86 



B< vhmeria 94 



Botrychium 140 



Brac'hyelytrum 129 



Brasenia 7 



Brassica 13 



Bromus 13a 



Hrunella 87 



Bursa 13 



Cacalia 6a 



Calamagrostis 130 



Cataniintha 86 



Calla 115 



Callitriche 43 



CalopOi^on 104 



Caltha 4 



Campanula 66 



Camptosorus 136 



Cannabis 94 



Capnoides 10 



Capsella 13 



Cardamine 11 



Carduus 63 



Carex 121 



Carpmus 97 



Carum 46 



Carya 95 



Cassandra 69 



Cassia 3a 



Castalia 8 



Castanea Cf, 



Castilleia 8a 



Catalpa 84 



Caulophyllum 7 



Ceanothus 34 



Celastrus 33 



Celtis 94 



Cephalanthus 5-' 



Cerasiium x8 



Ceratophyllum xoi 



Ch:erophyllum 47 



