Index to Orders and Genera 



Abies 26 



Abutilon 130 



Acalypha 123 



Acanthaceas 168 



Aceraceae 127 



Acer 127 



Acerates 151 



Achillea 189 



Acnida 87 



Acroanfhes 72 



Microstilis 72 



Acorus 58 



Actaea 94 



Actinorneris 18S 



See verbesina 188 



Adiantum 13 



Ailicea 82 



Pilea 82 



AdluiTiia 100 



Adnatum 17 



Amblistegrum 17 



Adonogan 175 



Krigia 175 



Agastache * 157 



Lopanthus 157 



Agrimonia 112 



Agropyron 43 



Agrostemma 88 



Lychnis 88 



Agrostls 37 



Ailanthus 122 



Aizoacese 88 



Picoideae 88 



A.iuga 156 



Alisma 31 



Alismaceffi 31 



Allium 63 



Alnus 79 



Alopecurus 36 



Alsine 90 



Althaee 129 



Alyssum 105 



Alyssum 105 



See Koniga 105 



Amaranthacese 87 



Amaranthus 87 



Amaryllidaceae 67 



Amblystegiuin 67 



Ambrosiaceae 178 



Ambroria 178 



Amelanchier 114 



Ammodenia 92 



Arenaria 92 



Ammo'ihila 37 



Ampelops's 129 



See Parthenocissus 129 



Amphicarpa 120 



See Falcata 120 



Anacardiaceae 125 



Anagalis 148 



Anaphalis 186 



Andromeda 145 



Andropogon 32 



Anemone 95 



Anemonella 96 



See Syndesmon 96 



Aneura 21 



Angelica 138 



Archangelica 138 



204 



Anlaconiniuni 17 



Anomorton 17 



Antennaria 186 



Anthemls 190 



Anthoxanthuni 35 



Antirrhinum 163 



Anychia 92 



O-ora 37 



Aphyllon 167 



See Thalesia 167 



Apios , 121 



Apium 141 



Aplectrum 74 



Apocynaceae 150 



Apocynum 150 



Aquilegia 95 



Arabia 105 



Aracese 58 



Arp'iacese 137 



Aralia 137 



See Panax 138 



Aralia 137 



Archangelica 138 



See Angelica 138 



Arctium 192 



Lappa 192 



Arctostaphylos 145 



Arenaria 91 



Arethusa 71 



Arisaema 68 



Arum 58 



Aristida 36 



Arlstolochiacese 82 



Aronia 114 



Pyrus 114 



Arrhenatherum 38 



Artemesia 190 



Asaruni 82 



Asclepiadaceas 150 



Asclepias 150 



Asparagus 66 



Aspidium 10 



See Dryopteris 10 



Asplenium 12 



Aster 181 



Aster 185 



See Doelingeria 185 



Asterella 21 



Astilbe 107 



Astragalus 117 



Atragene 96 



Clematis 96 



Atrichum 17 



Atriplex 86 



Avena 38 



,\%a!ea 144 



Rhododendron 144 



Ballota 159 



Balsamlnacese 128 



Baptisia 116 



Barbarea 102 



Barbula 17 



Batrachlum 98 



Ranunculus 98 



Bartramia 17 



Bazzania 22 



Benzoin 99 



Berberldaceae 98 



Berberis 98 



