INDEX. 



PAGE. 



Abronia 42, 43 



Acerates 32 



Achillea 27 



AcnWa 43 



Agropyrum 53 



Agrostis .T ,. 52 



Alisnia 50 



Aliamaceae 50 



Allium 48 



Alnus 47 



Alopecurus 51 



Amarantacesa 43 



Amarantus 43 



Ambrosia 23 



Aminania 15 



Ainorpha 11 



Ampehopsis 9 



Anacardiaceae 9 



Andropogon 51 



Anemone 3 



Antennaria 23 



Anthemis 27 



Aphyllon s 39 



Apios 13 



Aplopappus 20 



Apocynacese 31 



Apocynum 3 



Arabis 5 



Argemone 4 



Aristida ; -l 



Artemisia 27, 2* 



Asclepiadaceaa 31 



Asclepias 31, 32 



Aster 21 



Astragalus 11. 12 



Atriplex 44 



Bahia 26 



Beckniannia 50 



Berula 18 



Betula 47 



Bidens 25 



Bigelovia 20 



Boraginacese 34 



Bouteloua 52 



Brassica... 6 



PAGE. 



Brickellia 19 



Brunella 41 



Buchloe 52 



Calamagr stis 52 



Callitrichaceae 47 



Callitriche... 47 



Calo;-hortus 49 



Canielir. a 5 



Campanula '. .31 



Campanulaceae 30 



Capparidacefe 7 



Caprifoliaceae 19 



Capsella 6 



Carex 50 



Caryophylhu-eae 7 



Ca^tilleia 39 



Cenchrus... 51 



CVra<tium 7 



Cereus 17 



Chaenactis 26 



Chenopodiacese 43 



Ohenopodiam 43, 44 



Ohrysanthemam 27 



Ch v y giipogon 51 



Clirys ips s 20 



Cichoj-um 28 



Cicuta 18 



Clematis 3 



Cleome 7 



Cnicns 28 



Comandra 46 



Commelynaceae 49 



Composi t aa 19 



ConvolvulacecT 36 



Convolvulus 36 



'pis 25 



Corisp'^rmuin 44 



Cornaceae 19 



C .runs 19 



Corydalis 4 



Crepis '. 29 



Cmciferse 5 



Cucurbitace?e 17 



Cupulifera? 47 



Cuscuta 36 



