447] 



INDEX 



299 



References to the Flora are in brackets \ ~\ 



Sawatchense 106 



tenue microspermum 106 



unifolium 106 



viviparum 108 



Watsonii 106 



POLYPODIACEAE 49 



Polypodium 49 



hesperium 29, 49 



vulgare [49 



Polypody 49 



western.. 49 



Polypogon 63 



Monspeliensis 63 



Pomme blanche [160 



Pond lily, yellow 34, [125 



Pondweed 10, 



alpine 



fennel-leaved. 



long-leaved 55 



leafy 56 



spiral 56 



various-leaved 56 



PONDWEED FAMILY 55 



PONTEDERIACEAE 



Poplar 98 



balsam 98 



Poppy [126 



Mexican 13 



prickly... [126 



rough-fruited [126 



POPPY FAMILY, [126 



Populus 



acuminata 12, 22, 



angustifolia.12, 22, 24, 28, 37 



aurea 



balsamifera. 37, 



deltoides occidentalis 



occidentalis 



Sargentii 12, 22,28, 



tremuloides 25, 32, 33, 



aurea 



Porcupine grass 13, 



greenish 



Lettermann's 



Nelson's 



Scribner's 



western 



Portulaca 



oleracea 45, 



retusa. 



.45, 



Potamogeton 



alpinus 



fluitans 



foliosus 10, 



heterophyllus 10, 



lonchites 10, 



pauciflorus 56 



pectinatus 10, [56 



rufescens [56 



Spirillus 10, 56 



Potentilla 142 



arguta 144 



concinna 32, 142 



dissecta 42, 142 



glaucophylla 142 



diversifolia 142 



effusa 18, 143 



fissa 145 



fruticosa 144 



glaucophylla 142 



Hippiana 14,25,35, 143 



diffusa 143 



humifusa 142 



lateriflora 142 



leucocarpa 142 



minutifolia 143 



Monspeliensis 142 



Norvegica hirsuta 142 



paradoxa 141 



Pennsylvanicaarachnoidea. 143 



strigosa 22, 143 



propinqua 35, 143 



pulcherrima 35, 143 



Poverty-grass, bushy [60 



long-awned [60 



Prairie clover [160 



slender white [160 



violet 160 



hairy , 160 



Prairie flora 12" 



Prairie-grass [68] 



PRATENSES 17,18,24,27,31, 34 



Prickly cereus., 



green-flowered. 

 Prickly pear .... 



brittle 



Greene's 



many-sided. . . 



red-flowered... 



western 



Prickly poppy.. . 



hairy 



white 



Primrose . . 



evening 



Delavaux'... 



scapose 



tooth-leaved 



white 



narrow-leaved 



Parry's 39, 



rock 



PRIMROSE FAMILY.. . 



174 

 174 : 

 175 : 

 175' 

 175 : 

 175 : 

 175 

 175 : 

 126 

 126 

 126 

 187 

 178 

 179| 

 179 

 180 

 178 

 187 

 187 

 188 

 187 



