higens 580 



MacDougailii 583 



microdontiis 579 



mUlefiorits 580 



miUiicapitatus 582 



mtdtUobatus 582 



mutabilis 5S3 



Nelsonii 581 



nephrophyllus 583 



o&{anceo2atu« 583 



ocddentalis 578 



ooc2es 582 



pa{/05anu8 578 



perennans 581 



perplexus 580 



petfoetis 581 



petrocallis 581 



plattensis 581 



platylohus 582 



pseudaureus 582 



jmdicus 578 



PvTshianus 581 



pyrrhochroiis 583 



rapifoliua 579 



Eiddellii 583 



ro6ulatus 581 



Rydbergii 582 



soZicinzes 581 



saliens 579 



soppuZina 578 

 80miamplexicaiUis 

 579 



serra 579 



Soldanella 578 



soliiariits 582 



spartioides 584 



svhcuneatus 582 



subnudus 582 



taraxacoides 578 



Tracyi 583 



triangularis 578 

 tridenticulaiiis 583 



trigonophyllits 579 



'Uintahensis 581 



vulgaris 584 

 wemeriaefolius 



581 



Service-berry 2G6 



S^uvium 176 



Portulaaistrum 



sessile 176 



Setaria 46 



setosa 46 



Sheep Sorrel 153 



Sbepherdia 331 



argentea 332 



canadensis 332 



Shepherd's Purse 



220 



Shield Fern 21 



Shooting Star 375 

 Shrubby CinqUefoil 



251 



Shrubby Trefoil -306 



Sitibaldia 251 



procunib^DS 251 



Sidslcea 317 



Candida 317 



(M3 



ramosa 225 



viscosa 225 



Sbphora 272 



sericea , 272 



Sorbus 269 



scopulina 269 



Sorghastrum 43 



nutans 43 



Sorghum 43 



halepense 43 



Sorrel 153 



Field 153 



Mountain 152 



Sheep 153 



Sow Thistle 597 



Spanish Needles 550 



Sparganiaceae 32 



Sparganium 32 



androcladum 32 



angustifolium 32 



eiirycar^um 32 



minimum 32 



simplex 32 



Spartina 63 



cynosuroides 63 



gracilis 63 



Spatterdock ISS 



Spear Grass 69 



Spearmint 428 



>Specularia 474 



leptocarpa 474 



perfoliata 474 



iSpergularia 1 87 



sparsiflora 187 



;Sphaeralcea 318 



angustifolia ' 318 



crandallii 318 



louspidata 31 S 



grandiflora 318 



Munroana 318 



rivularis 318 



Sphaerostigma 342- 



andinum 343 



contortum 343 



minutiflora 343 



Nelsonii -343 



puhens 343 



tortum 343 



utahense . 343 



Spiderwort Family 



107 



Spike Rush 87 



Spiraea 248 



'heiulaefolia 249 



densiilora 249 



luoida 248 



'hnonogyna 248 



Spiranthes 1 25 



RomanzoHiana 125 



stricta 1 25 



Spirodela 107 



polyrhiza 1 07 



Spleenwort 22 



Spotobolus 54 



airoides 65 



acgutus 55 



asperifolius 55 



brevifolius 54 



