3o8 



[456 



References to the Flora are in brackets r 1 



robustus [165 



Tium [156 



alpinum 25,34,35, [156 



Drummondii 18, [156 



Toad-flax [211 



bastard [103 



Canada [211 



Tobacco [210; 



night-blooming [210 



Tomato [210; 



common [210^ 



Tonestus [230 



pygmaeus 42, [230^ 



Touterea decapetala [174 



multiflora [173 



nuda [173 



sinuata [173 



speciosa [173 



Townsendia [232 



exscapa 16, [233 



grandiflora 19, [232 



sericea [233 



Townsendia, large- iiowered . . .[232 

 silky [233 



Toxicodendron [167 



Rydbergii 20, [167 



Toxicoscordion [88 



falcatum 25, [81 



gramineum [81 



Tradescantia [87 



occidentalis [87 



scopulorura [87 



Universitatis 18, [87. 



Tragia [164 



ramosa [164 



Tragopogon [255 



porrifolius 45, [255 



porrifolius X pratensis [255 



pratensis 45, [255 



Treacle mustard [130 



Tridophyllum [141 



lateriflorum [142 



leucocarpum [142 



Monspeliense 45, [142 



paradoxum [141 



Trifolium [154 



dasyphyllum 42, [154 



hybridum 44, [154 



lividum 42, [154 



pratense 44, [154 



repens 44, [154 



Triple-awned grass [60 



Trisetum [65 



majus 39, [65 



montanum 33, [65 



spicatum [65 



subspicatum 31,32, 41 



majus [657 



molle [65] 



Triticum [77] 



sativum vulgare [77] 



vulgare 46, [77] 



Trollius [118] 



albiflorus 37,39, [118] 



laxus albiflorus [118] 



Troximon cuspidatum [157] 



glaucum [258] 



parviflorum [258] 



Troximon, cuspidate [257] 



Tumble weed [112] 



Tundra, wet alpine.. .37,38,39, 40 



TUNDRALES 38 



Turkey-foot grass 13, [57] 



Twayblade 27, [96] 



kidney-leaved [96] 



northern [96] 



Twin-flower [221] 



American [221] 



Twisted-stalk 27, [93] 



clasping-leaved [93] 



Typha [55] 



latifolia 10, [55] 



Typhaceae [55] 



Uliginose society 10 



Ulmaceae [103] 



Ulmus [103] 



Americana [103] 



Umbellales [181] 



Umbrella-wort [112] 



diff'use [113] 



hairy [113] 



heart-leaved [112] 



lance-leaved [113] 



narrow-leaved [113] 



Umbrella-wort family [112] 



Upper Sonoran vegetation. ... 9 

 Upper Transition vegetation. . . 9 



Urtica [102J 



gracilis 12, [102] 



Urticaceae [102] 



Urticales [102] 



Urticularia [219] 



vulgaris [219] 



Uva-ursi procumbens [186] 



Uva-ursi [186] 



Vaccaria [117] 



Vaccaria 45, [117] 



vulgaris [117] 



Vaccinium [187] 



caespitosum [187] 



erythrococcum [187] 



Myrtillus microphyllum [187] 



oreophilum [187] 



scoparium 42, [187], 



