INDEX OF GENERA. 



Abies 92 



Abutilon 19,129 



Acalypha 85, 132 



Acanthospermum . .. 131 



Acer 23 



Acerates 64 



Achillea 52,131 



Acnida 80 



Acolium 166 



Acorus 101 



Acrothecium 187 



Actaea 4 



Actinomeris 51 



Adesmia 130 



Adiantum 135 



Adlumia 7 



jEcidium 185 



jEgerita 186 



iEschynome 126 



^Ethusa 39 



Ageratam 131 



Agrimonia 29 



Agrostis 117, 133 



Agyrium 194 



Ahnfeltia 206 



Ailanthus 21 



Ailographum 196 



Aira 123 



Alectoria 160 



Aletris 98 



Alisma 98 



Allium 101,127 



Alnus 90 



Alopecurus 116,133 



Althaea 18 



Alyssum 10 



Amanita 167 



Amarantus 80, 133 



Amblogyna 133 



Amblystegium 152 



Ambrosia 49 



Amelanchier 32 



Amianthium 104 



Ammannia 35, 130 



Ammi 130 



Ampelopsis 22 



Amphicarpia 27 



Amphicarpum 124 



Amphoridium 145 



Anabiena 222 



Anacharis 93 



Anagallis 61 



Anchusa 132 



Andrsea 141 



Andromeda 59 



Andropogon 125 



Anemone 1 



Aneura 157 



Angelina 196 



Angiordium 177 



Anomodon 149 



Antennaria 53 



Anthemis 52i 131 



Anthericum 133 



Anthoceros 158 



Anthoxanthum 123 



Anthyllis 129 



Antirrhinum 70 



Anychia 17 



Aphanocapsa 223 



Aphanochsete 211 



Aphanothece 223 



Aphanorrhegma .... 145 



Aphyllon 73 



Apios 27 



Apium 130 



Aplectrum 97 



Apocynum 63 



Aptogonum 215 



Aquilegia 4 



Arabis 9 



Arachis 130 



Arachnion 176 



Aralia 40 



Archangelica 38 



Archemora 38 



Archidium 141 



Arctostaphy los 59 



Arcyxia 178 



Arenaria 15 



Arethnsa 95 



Argemone 6 



Ariscema 100 



Aristida 119 



Aristolochia 84 



Armillaria 168 



Arrhenatherum 123 



Artemisia 53 



Arthonia 166 



Arthrobotryum 186 



Arthrodesmus 218 



Arthrosporium 186 



Artocreas 174 



Asarum 84 



Asclepias 63 



Ascobolus 194 



Ascomyces 195 



Ascyrum 17 



Asparagus 102 



Aspergillus 187 



Asperugo 132 



Asimina 5 



Aspidium 136 



Asplenium 136 



Aster 46 



Asterella 158 



Asteroma 181 



Astragalus 130 



Atrichum 147 



Atriplex 81,133 



Atropa 132 



Aulacomnion 147 



Avena 123, 134 



Baccharis 49,131 



Badhamia 177 



Baeomyces 165 



(225) 



