Index to Genera. 



225 



Campanula 69 



Campeloma 94 



Camptosorus 60 



Cardamine 69 (or 59; 



Carex 59, 66 



Carpinus 166 



Carpites 171, 177 



Carpolithes 177 



Carya 68-9 (174) 



Carychium 88 



Cassia 62, 176 



Castanea 167 



Catalpa 177 



Ceanothus 61 



Celastrinites 173 



Celastrus 68, 173 



Celtis 68, 168 



Cenchrus 62, 200, 204, 218, 220, 



pi. 19. 

 Cephalanthus 60 

 Ceratophyllum 57 

 Cercis 68, 176 

 Cereus 64 

 Chaerophyllum 69 

 Chamae&aracha 64-5 

 Chara 162 



Chenopodium 64-6, 69 

 Chrysopogon 64 

 Chrysopsis 62 

 Cincinnatia 93 

 Cinna 69 

 Circinaria 79 

 Cladothrix 64-5 

 Claytonia 69 

 Clematis 61 

 Cleome 64 

 Cleomella 63 

 Cnlcus 64-5 

 Coix, 200, 217 

 Colletes 43 

 Colutea 177 

 Comraelina 63 

 Conobea 59 

 Conulus 81 

 Coreopsis 65 

 Corispermum 63 

 Cornus 61, 68 

 Corylus 68, 178 

 Crataegus 176 

 Croton 60-1 

 Cryptotaenia 69 



Cucurbita 64 

 Cuphea 66 

 Cycloloma 62 

 Cynodon 209, 217 

 Cyperus 59, 62 

 Cytisus 176 



Dactylis 200, 210, 217, 219, pi. 17 



Dalbergia 176 



Dalea 61 



Delphinium 65 



Dentaria 69 



Deschampsia 207-8, 217 



Desmanthus 67 



Desmodium 62, 65 



Dicentra 69 



Diodia 66 



Diospyros 170-1, 185, 188, pi. 12. 



Diplazium (163) 



Distichlis 66 



Dodonaea 172 



Draba 65 



Eatonia 64 



Echinacea 60 



Echinocystis 68 



Echinospermum 64-5, 69 



Eleocharis 59 



Eliraia 91-2 



Ellisia 69 



Elodea 58 



Elymus 64, 200, 216-7, 219, pi. 1 8 



Emphor (47) 



Engelmannia 64 



Entechnia (47) 



Epeolus 51-2 



Epilobium 59 



Eragrostis 59, 62-3 



Erigeron 63, 66, 68 



Eriochloa 59 



Eriogonum 61, 63 



Erysimum 64 



Erythronium 69 



Eucera 47 



Euchlaena 202, 217, 219, pi. 17 



Eupatorium 59, 69 



Euphorbia 60-3 



Evax 64 



Evernia 197 



Evolvulus 64 



Fagus 29, 178 



