455] 



INDEX 



307 



References to the Flora are in brackets [ 



coarsely toothed 



common 



dwarf 



false, five-ribbed 



petioled 



red-streaked .... 

 subrhomboid.. . . 



Utah 



Svida 



stolonifera 23, 29, 



243 

 242 

 243 

 243 

 243 

 242 

 243 

 243 

 181 

 181 



Swamp laurel, small leaved. . . 

 Sweet ciceley 21 



obtuse-fruited 



smooth 



Sweet clover 



white 



Sweet coltsfoot 



arrow-leaved 



Sweet flag 10, 



Swertia.,7 [192 



congesta 192 



palustris 34,40, 192 



Swertia 192 



dense-flowered.. 192 



marsh 192 



Switch grass, tall [58 



SYLVALES 31, 36 



SYLVESTRES 18, 20, 24 



SYMPETALAE 



Symphoricarpos 



occidentalis 20, 26, 



oreophilus 32, 



vaccinioides.. . 



185 

 221 

 221 

 221 

 221 

 Syntherisma [57 



sanguinale 44, 



Synthyris alpina 



Synthyris, alpine 



Talinum 



parviflorum 30, 



Tansy mustard 



cut-leaved 



fine-leaved 



hoary 



western 



Taraxacum 



montanum 



officinale 



Taraxacum 45, 



Temperature and rainfall 



TETRAGONIACEAE 



Tetraneuris 



lanata 



lanigera 32,42, 



Teucrium 



occidentale 11, 



Thalesia.. .... 



57 

 215 

 215 

 113 

 113 

 130 

 130] 

 130 

 130 

 130 

 258 

 258 

 258 

 258 



8* 

 113; 



245; 



205 

 205 

 219 : 



fasciculata 43, 



lutea 



Thalictrum 



Fendleri 28, 



purpurascens 22, 



Thelesperma 



gracile 16, 



Thelesperma, slender 



Thelypodium 



paniculatum 



sagittatum 



torulosum 



Thelypodium, panicled 



Thermopsis 



arenosa 



divaricarpa 22, 25, 32, 



pinetorum 25, 43, 



Thermopsis, divaricate-podded 



pineland 



sand 



Thistle 13, 



Colorado 



219 



219 



125 



125 



125 



244 



244 



244 



135 



135 



135 



135 



135 



152 



153 



153 



152 



153 



152 



153 



253 



254 



253 



254 



253 



254 



254 



253 



254 



111 



259] 



255] 



woolly-headed 40 



255 

 225 

 127 

 127 

 127 

 127 

 127 

 210 

 210 

 225 



crag 



erose-bracted. 



gray 



knapweed.. . . 

 large-headed, 



Parry's 



Platte 



Russian. . 



sow. 

 star. 



yellow-spined . . 



THISTLE FAMILY 



Thlaspi 



arvense 45 



Coloradense 28,39 



Nuttallii 21,41 



purpurascens 41 



Thorn-apple 



purple 



Thorough wort 



Three square [79 



THYMELIALES [175 



Timothy [62 



common [62 



false... f [62 



mountain [62 



108 

 108 

 165 

 165 

 165 

 165 

 165 

 165 



Tiniaria 



Convolvulus 44, 



Tithymalus 



Arkansanus 16, 



marginatus 



tetramerus 



philorus 19, 



dichotoma.. 



