Rock Cress (Arabia), 204. 



Eock Fringe (Epilobium 1.), 270. 



Eomanzoffia, 316. 



Eosaceae, 228. 



Eose family, 228. 



Bosewort (Sedum 1.), 212. 



Eowan (Pyrus), 233. 



Subacer, 228. 



Eubiaceae, 344. 



Eubus, 228. 



Eumex, 158, (166), 167. 



Eush (Juncus), 129. 



Eush family, 127. 



Sagebrush (Artemisia 1.), 395. 



Sagina, 172, 175. 



St. John's-wort (Hypericum) , 266. 



St. John's-wort family, 266. 



Salicaceae, 148. 



Salix, 148. 



Sambucus, 346. 



Sandwort (Arenaria), 175. 



Sanieula, 275, 276. 



Sarcodes, 282, 291. 



Sarraceniaceae, 212. 



Saxifraga, 214, (217), 218. 



Saxifragaceae, 214. 



Saxifrage (Saxifraga'), 218. 



Saxifrage family, 214. 



Scarlet Gilia (Gilia 3.), 303. 



Scirpus, 107, (107), 108. 



Scorzonella, 403. 



Scouring Eush (Equisetum 2.), 79. 



Scrophulariaceae, 322. 



Sedge (Carex), 110. 



Sedge family, 107. 



Sedum, 212. 



Selaginella, 80. 



Selaginellaceae, 80. 



Selinum, 275, 278. 



Seneeio, 353, 388. 



Senecioneae, 352, 353. 



Sericotheca, 231. 



Service Berry (Amelanchier), 230. 



Shin Leaf (Pyrola), 285. 



Shooting Star (Dodecatlieon) , 293. 



Shrubby Cinquefoil (Potentilla 1.), 



234. 



Sidalcea, 264. 



Sierra Primrose (Primula 1.), 292. 

 Sieversia, 240. 

 Silene, 172. 



Silver Pine (Pimm 1.), 81. 

 Silver Willow (Salix 3.), 150. 

 Sisyimbrium, 203. 

 Sisyrinchium, 145. 

 Sitanion, 90, 99. 

 Sitka Willow (Salix 9.), 152. 

 Smilacina, 134, 141. 

 Snake-root (Sanieula), 276. 

 Snapdragon (Antirrhinum), 330. 

 Sneezeweed (Helenium), 376. 

 Snowberry (Symphoricarpos), 347. 

 Snow-bush (Ceanothus 2.), 263. 



Snow Plant (Sareodes), 291. 



Snow Willow (Salix 2.), 149. 



Solidago, 352, 358. 



Sorbus, 233. 



Sparganiaceae, 88. 



Sparganiurn, 88. 



Spatularia, 219. 



Spear-grass (Poa), 103. 



Speedwell (Veronica), 329. 



Sphaeromeria, 394. 



Sphenoscifidium, 278. 



Spike Eush (Eleocharis) , 107. 



Spiraea, 228, (231), 232. 



Spiranthes, 145, 146, (147). 



Spleenwort (Asplenium), 75. 



Sporobolus, 92. 



Spraguea, 180, 184. 



Spring Beauty (Claytonia), 183. 



Star Tulip (Caloehortus I.), 138. 



Steer's Head Flower (Dicentra 2.), 



196. 



Steiranim-a, 220. 

 Stellaria, 172, 178. 

 Stellariopsis, 228, 246. 

 Stenotus, 361. 

 Stipa, 90, 91, (92). 

 Stonecrop (Sedum), 212. 

 Strawberry (Fragaria), 247. 

 Streptanthus, 197, (206), 209. 

 Subularia, 197, 211. 

 Suksdorfia, 214, 217. 

 Sulphur Flower (Eriogonum 8.), 163. 

 Sundew (Drosera), 211. 

 Sundew family, 211. 

 Sunflower family, 352. 

 Sweertia, 295, 299. 

 Sweet Cicely (Osmorrhiza) , 275. 

 Sword-fern (Polystichum 1.), 75. 

 Symphoricarpos, 346, 347. 

 Talinum, 181. 



Tamarack Pine (Pinus 6.), 84. 

 Tanacetum, 353, 394. 

 Tansy (Tanaoetum), 394. 

 Tarweed (Madia), 375. 

 Tellima, 214, 218. 

 Thalictrum, 186. 



Thimble Berry (Eubus 1.), 228. ^ 

 Thistle (Cirsium), 402. 

 Thlaspi, 197, 201. 

 Thoroughwort (Eupatorium), 354. 

 Tofieldia, 134, 140. 

 Tonestus, 362. 

 Tovaria,, 141. 

 Trautvetteria, 186. 

 Trichophyllum, 378. 

 Trifoliuni, 248. 

 Triglochin, 89. 

 Trisetum, 91, 101. 

 Troximon, 404, 405. 

 Tsuga, 81, 85. 

 Turritis, 206. 



Twayblade (Listera), 145. 

 Twinberry (Lonicera 1.), 349. 



[422] 



