445] 



INDEX 



297 



References to the Flora are in brackets f 1 



Nuttall's [127 



purplish [127 



Pennyroyal [207 



hispid [207 



Pentstemon [211 



alpinus 26, 31, [212 



erosus [212 



glaber alpinus [212 



glaucus [212 



stenosepalus 42, [212 



gracilis 19,26,(212 



humilis 16, 19,26,(212 



oreophilus 26, 32, [211 



procerus [213 



riparius [212 



Rydbergii [212 



secundiflorus 16, 19, [212 



unilateral 15, 19, [212 



Pepper grass [127 



divergent [127 



medium [127 



Peramium [97 



ophioides 25, [97 



Peritoma [135 



serrulatum [135 



albiflorum [135 



Persicaria [107 



emersa 11, [107 



lapathifolia 11, [107 



Persicaria 44, [107 



punctata 11, [107 



Pesedera [169 



quinquefolia [169 



vitacea 12,22, 169, [170 



Petalostemon [160 



gracilis oligophyllus [160 



oligophyllus 14, [160 



pubescens 14, [160 



purpureus 14, [160 



violaceus [160 



Petasites [248 



sagittata [248 



Phaca elegans [156 



flexuosa [1 56 



Phacelia [199 



glandulosa 36, [199 



heterophylla 19, [199 



leucophylla [199 



Neo-Mexicana alba [200 



sericea [200 



Phacelia [199 



glandular 36, [199 



New Mexican, white [200 



silky [200 



various-leaved [199 



Phalaris [59 



arundinacea 11, [59 



Phanerogams 43 



Pharbitis [195] 



hispida [195] 



purpurea 46, [195] 



Phleum [62] 



alpinum 33, 35, [62] 



pratense 44, [62] 



Phlox [196] 



depressa 26, [196] 



longifolia [196] 



multiflora [196] 



depressa [196] 



Phlox [196] 



long-leaved [196] 



low [196] 



many-flowered [196] 



Phragmites [67] 



communis [67] 



Phragmites 21,22, [67] 



Phyla [205] 



cuneifolia 11, [205] 



Physalis [208] 



comata [209] 



heterophylla 45, [209] 



lanceolata 14, [208] 



laevigata [208] 



lobata [209] 



longifolia [208] 



rotundata 16, [209] 



Virginiana 15,45, [208] 



Physaria [128J 



didymocarpa 30, [128] 



floribunda 30, [128] 



Physiography 1 



Picea [53] 



Engelmannii. .24, 31, 36, 37, [53] 



Parryana 25,31, [53] 



pungens [53] 



PlCKERELL-WEED FAMILY [88] 



Picradeniopsis [244] 



oppositifolia [244] 



Pigweed [108], [111] 



common [108] 



Powell's [Ill] 



prostrate .-.[ill] 



rough [Ill] 



white [112] 



winged |110j 



Pin-clover [163] 



Pinaceae [53] 



PlNALES [53] 



Pine 24, 31, [53] 



bull 20,24,25, 31,43, [52] 



Cembra [53] 



lodgepole 30,31,43, [53] 



Rocky Mountain white. .31, [53] 



Pine family [53] 



