INDEX. 



791 



Page. 



Sensitive brier 330 



Serieotheca 310 



Service berry 322 



Seseli 485 



Sesleria 83 



Sesuvium 229 



Setaria 60 



Shad scale 204 



Sheep sorrel 191 



Sheepweed 658 



Shepherdia 458 



Shepherd 's-purse 273 



Shinleaf 488 



Shinnery oak 172 



Shm-oak 172 



Shoestrings 349 



Shooting star 492 



Shrubby cinquefoil 316 



trefoil 388 



Sibbaldia 315-316 



Sicydium 616 



Sicyos 614 



Sida 418, 419, 423, 4S4, 425-426 



Sidalcea 418 



Sidanoda 427 



Sideranthus 663-665 



Sieglingia 90,91 



Sieversia 316-317, 318 



Silenaceae 240-242 



Silene 241-242 



Simarubaceae 390 



Simsia 712 



Sinapis 281 



Sisymbrium 284, 285-286, 287 



Sisyrinchium 147-148 



Sitanion 107-108 



Sitilias 624 



Slum 479 



Six-weeks grama 86 



needle grass 63 



Skullcap 555 



Skunk cabbage 128 



Sleepy catchfly 241 



grass 67 



Slender foxtail 74 



wheat grass 105 



Slough grass 84 



Small, J. K 11 



Smartweed 195 



Smilacina 139 



Smooth scouring rush 28 



Snakeweed 656, 658 



Sneezeweed 726, 733 



Snowberry 610 



Snow-on-the-mountain 396 



Soap, substitute 136 



Soapberry 412 



family 412 



Soapweed 136 



Solanaceae 566-574 



Solanum 572-573, 574 



Solidago 667, 668-671 



Solomon's seal 139 



false 139 



Sonchus eg^,623 



Sophia 286-288 



Page. 



Sophora *. 339 



Sorbus 324 



Sorghastrum 52 



Sorghum 52 



Sorilla 390 



Sorrel, mountain 190 



sheep 191 



Sotol 138 



Southern Canary grass 61 



Sow thistle 623 



Speargrass, low 99 



Spearmint 554 



Spectacle-pod 269 



Specularia 616-617 



Speedwell 588 



alpine 589 



purslane 589 



thyme-leaved 590 



water 589 



Spergula 238 



Spermacoce 606 



Spermatophyta 30-753 



Spermolepis 478-479 



Sphaeralcea 420-424 



Sphaerostigma 465 



Sphenopholis 92 



Spiderwort 126 



family 125-126 



Spike rush 112 



Spmy aster 686 



Spiraea S09, 310, 321 



Spirodela 124 



Spirostachys 201 



Spleenwort 24 



Sporobolus 71,74, 75-77 



Sprangle 83 



Spring beauty 233 



Spruce 33 



Colorado blue 34 



Douglas 35 



Engelmarm 34 



Spurge 397 



family 393-405 



Squaw root 599 



Squirrel-tail grass 107 



Stachys 565-566 



Staff-tree family 409-410 



Standley, Paul C, botanical work in New 



Mexico 5 



Stanleya 266-267 



Stanleyella 267 



Star thistle 749 



Starwort 235 



water 405 



State flower of Colorado 248 



Stutice 490 



Stegnocarpus 536 



Steironema 491 



Stellaria 235, 236 



Slenactis 681 



Stenandrium 598 



Stenogonum 187 



Stenolobium 601 



Stenophyllus 114 



Stenotus 666,667 



Stephanomeria 620 



