445] 



INDEX 



297 



References to the Flora are in brackets \ 



Nuttall's 



purplish 



Pennyroyal 



hispid 



Pentstemon 



alpinus 26,31, 



erosus 



glaber alpinus 



glaucus 



stenosepalus 42, 



gracilis 19,26, 



humilis 16, 19,26, 



oreophilus 26, 32, 



procerus 



riparius 



Rydbergii 



secundiflorus 16, 19, 



unilateralis 15, 19, 



Pepper grass 



divergent 



medium. . 



127 

 127 

 207 

 207 

 211 

 212 

 212 

 212 

 212 

 [212 

 212 

 212 

 211 

 213 

 212 

 212 

 212 

 212 

 127 

 127 

 .127; 



Peramium [97 



ophioides 25, [97 



Peritoma 135; 



serrulatum 135 



albiflorum 135; 



Persicaria 107 



107 

 107 : 

 107 

 107 : 

 169 

 169 

 170 

 160 

 160 

 160 

 160 

 160 

 160 

 248 

 248 

 156 

 156 

 199 

 199 

 199 

 199 

 200 

 200 

 199 

 199 

 200 

 200 

 199 



Phalaris.. / [59 



emersa. 



11, 



lapathifolia 11, 



Persjcaria 44, 



punctata 11, 



Pesedera 



quinquefolia 



vitacea 12,22, 169, 



Petalostemon 



gracilis oligophyllus 



oligophyllus 14, 



pubescens 14, 



purpureus 14, 



violaceus 



Petasites 



sagittata 



Phaca elegans 



flexuosa 



Phacelia 



glandulosa 36, 



heterophylla 19, 



leucophylla 



Neo-Mexicana alba 



sericea 



Phacelia 



glandular 36, 



New Mexican, white 



silky 



various-leaved 



arundinacea 



[59 

 11, [59 



Pharbitis 



hispida 



purpurea 46, 



Phleum 



alpinum 33,35, 



pratense 44, 



Phlox 



depressa 26, 



longifolia 



multiflora 



depressa 



Phlox 



long-leaved 



low 



many-flowered 



Phragmites 



communis 



Phragmites 21, 22, 



Phyla 



cuneifolia 11, 



Physalis 



comata 



heterophylla 45, 



lanceojata 14, 



laevigata 



lobata 



longifolia 



rotundata 16, 



Virginiana 15, 45, 



Physaria 



didymocarpa 30, 



floribunda. 30, 



Physiography 



Picea 



Engelmannii. .24, 31, 36, 37, 



Parryana 25, 31, 



pungens 



PlCKERELL-WEED FAMILY 



Picradeniopsis 



oppositifolia 



Pigweed [108], 



common 



Powell's 



prostrate 



rough 



white 



winged 



Pin-clover 



PlNACEAE 



FINALES 



Pine 24, 31, 



bull 20,24,25, 31,43, 



Cembra 



lodgepole .. .30, 31,43, 



Rocky Mountain white . . 31, 



PINE FAMILY. . 



1 



53 



53 



53 



53 



88 



244 



244 



111 



108 



111 



111 



111 



112 



110 



163 



53 



53 



53 



52 



53 



53 



53 



53 



