INDEX. 



PAGE. PAGE. 



Abronia 42, 43 Brickellia 19 



Acerates 32 Brunella 4.1 



Achillea 27 Buchloe 52 



Aenida 43 Calamagr stis 52 



Agropyrum 53 Callitrichacese , 47 



Agrostis 52 Callitriche 47 



Alisma '. 50 Caloi-hortus 49 



Alismace;e 50 Camelina 5 



Allium 48 Campanula 31 



Alnus 47 Campanulaceee 30 



Alopecurus 51 Capparidacese 7 



Amarantaceee 43 Caprifoliacese 19 



Amarantns 4o Capsella 6 



Ambrosia 23 Carex 50 



Ammania 15 Caryophylla-jese 7 



Amorpha 11 Ca-tilleia 39 



Ampelopsis t Cenchrus... . 51 



Anacardiacese 9 Cerastium 7 



Andropogon 51 Cerens... 17 



Anemone 3 Chaenactis 26 



Antennaria 23 Chenopodiacese 43 



Anthemis 27 Chenopodium 43, 44 



Aphyllon 39 Chrysanthemum 27 



Apios 13 Chrysnpogon 51 



Aplopappus 20 Clnysopsis -0 



Apocynacese 31 Cjctiorum 28 



Apocynum 3 Cicuta 18 



Arabia 5 Clematis 3 



-Argemone 4 Cleome 7 



Aristida '1 Cnicu.s 28 



Artemisia 27, 28 Comainlra 46 



Asclepiadacese 31 Commelynacese 49 



Asclepias 31, 32 CJom'positse 19 



Aster 21 Convolvulacea 1 36 



Astragalus 11, 12 Convolvulus 36 



Atriplex 44 Coivpsis 25 



Bahia 26 Corispermurn 44 



Beckmannia 50 Cornacese ... 19 



Bernla 18 C .runs 19 



Betula 47 Corydalis ,... 4 



Bidens '.... 25 Crepis 29 



Bigelovia 20 Cruciferee 5 



Boraginaceaj.... 34 Cucurbitacese 17 



Bouteloua 52 Cupuliferse 47 



Brassica 6 Cuscuta.... ... 36 



