638 



INDEX 



aperta 419 



Bakeri 419 



caespitosa 418 



cana 418 



cristata 418 



elata 418 



eulophits 417 



flava 417 



flavoculata 417 

 fulvocanescens 418 



glomerata 419 



loDgiflora 419 



multicatilis 417 



nana 418 



sericea 418 



suffruticosa 417 



thyrsiflora 419 



virgata 419 



OreochryBum 604 



Parryi 604 



Oreoxis 354 



alpina 354 



Bakeri 354 



humilis 354 



Orobanchaceae 463 



Orobanche 463 



ludoviciana 463 



multiflora 46^ 



Orogenia 349 



linearifolia 349 



Orpine Family 232 



Orthocarpus 461 



luteus 461 

 purpureo-albus 



462 



Tolmiei 462 



Oryzopsis 50 



asperifolia 51 



exigua SO 



juncea 50 



micrantha 50 



Osmorhiza 348 



nuda 348 



OXALIDACEAE 304 



Oxalis 304 



coloradensis 304 



stricta 304 



violacea 304 



Oxeye Daisy 565 



Oxyhaphus 173 



angustifolius 1 74 



Bodinii 174 



hirsutiLs 173 



nyctaginea 173 



Oxygraphis 203 



Oxypolis 362 



Fendleri 362 



Oxyria 152 



digyna 153 



Oxytenia 450 



acerosa 540 



Oxytropis 292 



campestris 295 



splendens 295 



Oyster Plant 289 



Ozomelis 236 



Pachylophus 339 



caespitosus 340 



cauleacena 341 



eximius 340 



glaber 340 



hirsutus 340 



xnacroglottis 340 



marginatus 341 



montanus 340 



Pachystima 313 



myrsinites 313 



Panic Grass 45 



Panicularia 74 



horealis 74 



Panicum 45 



capillare 45 



sanguinale 44 



scoparium 45 

 Scribnerianum 45 



virgatum 45 



Papaver 205 



alpinum 205 



nudicaule 205 



pygmaeum 205 



Papaveraceae 205 



Paper Birch 140 



Parietaria 144 

 pennaylvanica 144 



Parnassia 234 



Rmbriata 234 



kotzebuei 234 



palustris 234 



parviflora 234 



rividaris 234 



Parnassus, Grass of 

 234 



Paronychia 187 



depressa 188 



diffusa 188 



Jamesii 188 



pulvinata 188 



sessilifolia 188 



Wardii 188 



Parosela 297 



aurea 298 



Dalea 297 



enneandra 297 



formosa 298 



Jamesii 298 



lanata 298 



Porteri 298 



rubescens 298 



Parry 212 



Parsnip Family 346 



Parthenice 639 



mollis 539 



Parthenium 540 



alpinum 540 



Parthenocissus 316 



vitacea 316 



Paspalum 43 



setaceum 44 



Pasque Flower 197 



Pastinaca 365 



sativa 365 



Pea 301 



Family 270 



Peach-leaved Willow 

 130 



Pearl wort 185 

 Pearly Everlasting 



537 



Pectis 563 



angustifolia 563 



Pectocarya 414 



miser 414 



Pedicularls 455 



bracteosa 456 



canadensis ' 456 



contorta 455 



crenulata 455 



ctenophora 455 



cystopteridifolia 



456 



Grayi 456 



greenlandica 456 



Hallii 456 



lunata 456 



montanensis 456 



Parryi 456 



procera 456 



racemosa 455 



scopulorum 456 



"Pe-ik" 547 

 Pellaea 20 



atrapurpurea 20 

 Breweri 20 



densa 20 



gracilis 18 



occidentalis 20 

 pumila 20 



Wrightiana 21 



Pennyroyal 431 



Pentstemon 439 



acuminatus 444 



albidus 448 



alpinus 441 



ambiguus 443 



angustifolius 443 



arenicola 444 



aridus 443 



azureus 449 



Bakeri 441 



barbatus 441 



brevifolius 445 



Bridgesii 448 



caeruhibs 443 



caespitosus 446 



cavdatus 444 



collihus 447 



coloradensis 446 



comarrhenus 442 



Crandallii 446 



erassifolivs 442 



cristatus 448 



cyananthus 442 



cyathoplwrus 444 



deustus 442 



Eatonii 441 



erianthera 448 



erosus 445 



exilifolius 443 



Fendleri 444 



Fremontii 442 



fruticosus 442 



glaber 441 



glaucus 445 



gracilis 447 



grandiflonis 444 



Hallii 443 



Harbourii 446 



Haydenii 443 



heterophyllus 447 



' humilis 445 



Jamesii 447 



Kingii 448 



laricifolius 443 



linarioides 446 



Moffattii 448 



montanus 448 



oreophilus 441 



Owenii 445 



procerus 444 



'lyrocumhens 446 

 pseudohumilis 445 

 psevdoprocerus 445 



radicosus 447 



ripariiis 441 



B,ydbergii 445 



secundiflorus 444 



sepalulus 449 



similis 447 



speciosus 442 



strictiformis 441 



strictus 441 



suffrutescens 446 



teitcrioides 446 



Torreyi 441 



trichander 441 



unilateralis 442 



utahensis ' 441 



Watsonii 445 



Xylus 446 



Peppergrass 212 



Peramium 126 



Menziesii 126 



ophioides 126 



Peraphyllum 268 

 ramosissimum 268 



Pectianthia 236 



Perennial Fringed 



Gentian 381 



Perennial Rye Grass 

 78 



Pericome 553 



caudata 553 



Peritoma 231 



Persicaria 157 



Petalostemon 298 



candidus 299 



compactus 299 



macrostachyus 299- 



mollis 299 



oligophyllus 299 



pubescens 299 



purpureus 299 



tenuifoliits 299 



villosus 299 



violaceus 299 



Petasites 571 ' 



sagittata 571 



Petradoria 504 



pumila 504 



Petrophyton 249 



caespitosum 249 



