455] 



307 



References to the Flora are in brackets f 1 



coarsely toothed [243] 



common [242] 



dwarf [243] 



false, five-ribbed [243] 



petioled [243] 



red-streaked [242] 



subrhomboid [243] 



Utah [243] 



Svida [181] 



stolonifera 23,29,(181] 



Swamp flora 10 



Swamp laurel, small leaved. . . . [186] 



Sweet ciceley 21, [182] 



obtuse-fruited [182] 



smooth [182] 



Sweet clover [155] 



white [155] 



Sweet coltsfoot [248] 



arrow-leaved [248] 



Sweet flag 10, 87 



Swertia [192] 



congesta [192] 



palustris 34, 40, [192] 



Swertia [192] 



dense-flowered [192] 



marsh [192] 



Switch grass, tall [58] 



SYL VALES 31, 36 



SYLVESTRES 18, 20, 24 



Sympetalae [185] 



Symphoricarpos [221] 



occidentalis 20, 26, [221] 



oreophilus 32, [221] 



vaccinioides [221] 



Syntherisma [57] 



sanguinale 44, [57] 



Synthyris alpina [215] 



Synthyris, alpine [215] 



Talinum [113] 



parviflorum 30, [113] 



Tansy mustard [130] 



cut-leaved [130] 



fine-leaved [130] 



hoary [130] 



western [130] 



Taraxacum [258] 



montanum [258] 



officinale [258] 



Taraxacum 45, [258] 



Temperature and rainfall 88 



Tetragoniaceae [113] 



Tetraneuris [245] 



lanata [245] 



lanigera 32, 42, [245] 



Teucrium [205] 



occidentale 11, [205] 



Thalesia [219] 



fasciculata 43, [219] 



lutea [219] 



Thalictrum [125] 



Fendleri 28, [125] 



purpurascens 22, [125] 



Thelesperma [244] 



gracile 16, [244] 



Thelesperma, slender [244] 



Thelypodium [135] 



paniculatum [135] 



sagittatU7n [135] 



torulosum [135] 



Thelypodium, panicled [135] 



Thermopsis [152] 



arenosa [153] 



divaricarpa 22, 25, 32, [153] 



pinetorum 25,43, [152] 



Thermopsis, divaricate-podded [153] 



pineland [152] 



sand [153] 



Thistle 13, [253] 



Colorado [254] 



crag [253] 



erose-bracted [254] 



gray [253] 



knapweed [254] 



large-headed [254] 



Parry's [253] 



Platte [254] 



Russian [HI) 



sow [259] 



star [255] 



woolly-headed 40 



yellow-spined [255] 



Thistle family [225] 



Thlaspi [127] 



arvense 45, [127] 



Coloradense 28,39,(127] 



Nuttallii 21,41,(127] 



purpurascens 41, [127] 



Thorn-apple [210] 



purple [210] 



Thoroughwort [225] 



Three square [79] 



Thymeliales [175] 



Timothy (62] 



common [62] 



false (62] 



mountain [62] 



Tiniaria [108] 



Convolvulus 44, [108] 



Tithymalus [165] 



Arkansanus 16, [165] 



marginatus [165] 



tetramerus [165] 



philorus 19,(165] 



dichotoma [165] 



