566 



INDEX. 



Pag«. 



SoMdago aspera i. 363 



asperata 361 



axillaris 358 



bicolor 356 



caesia 359 



Canadensis 365 



ciliaris 362 



cinarescens 364 



confertiflora . - 356 



flexicaulis 358 



gigantea 366 



gigantea 365 



graminifolia . . 366 



grandiflora . - 359 



hispida 364 



humilis 363 



leevigata 360 



lanceolata 366 



lanceolata p... 367 



latifolia 356 



limonifolia 360 



livida 358 



Muhlenbergii . 362 



neglecta 36 1 



nemoralis 364 



nutans 365 



odora 364 



Ohioensis 360 



patula 361 



procera 365 



retrorsa 364 



rigida _. 359 



rugosa 363 



sempervirens . . 360 



serotina 365 



serotina 366 



squarrosa 356 



stricta 366 



tenuifolia 366 



ulmifolia 363 



Virga-aurea 359 



Solomon' s-seal ii. 277 



SoNCHns i. 420 



acuminatus 419 



acuminatus 420 



Vtge. 



Sonchus alpinus 1. 420 



arvensis 421 



asper 421 



Canadensis . . 420 

 Carolinianus . 421 



cUiatits 420 



fallax.. 421 



floridanus 419, 420 



oleraceus 420 



oUraceus (3. .. 421 



pallidus 420 



spicatus . 420 



spinosus 421 



spinulosus . 421 



Sophora alba i. 188 



australis 188 



Sorbus Americana i. 224 



aVfCuparia 224 



Sorrel ii. 156 



Sour-gum ii. 161 



Sowthistle -._ i. 420 



Spanish-needles i. 389 



Sparoanium ii. 248 



Americanum . . 249 

 angustifolium . 249 



erectum 249 



natans 249 



ramosum 248 



simplex 249 



Spartina ii. 447 



alternifolia 449 



cynosuroides .. 448 



glabra 449 



juncea 448 



leevigata 449 



polystaehya . 448, 449 



pumila 448 



Spearmint ii. 56 



Spear wort i. 11 



Specularia i. 428 



perfoliata 428 



Speedwell ii. 40 



Spergula i. 106 



arvensis 106 



Canadensis 106 



Pug*. 



Spergula rubra i. 106 



Speroule^ i. 106 



Spergularia arvensis . i. 106 



rubra 106 



Spergulastrum gramineum, 



i. 97 

 lanceolatum . . 98 



Spice-bush ._- .^ ii. 159 



Spiderwort ii. 332 



Spiderwort Tribe ii. 332 



Spike-grass ii. 473 



Spike-rush ii. 346 



Spikenard , i. 284 



Spindle-tree i. 141 



Spindle-tree Tribe i. 139 



Spir^a i. 198 



Aruncus 199 



opulifolia 198 



salicifolia 198 



stipulacea 201 



stipulata 201 



tomentosa 199 



irifoliata 200 



Spieanthes ii. 282 



cBstivalis 284 



cernua 283 



gracilis 282 



plantaginea 284 



torlilis 283 



Spirodela polyrrhiza . ii. 246 



Spleen wort ii. 491 



Sporobolus asper ii. 439 



Spotted Wintergreen. . i. 455 



Spring Beauty i. 109 



Spring Cress i. 56 



Spruce... ii. 230 



Spurge ii. 174 



Spurge Tribe ii. 172 



Spurry i. 106 



Squaw Huckleberry. . i. 446 



Squaw-root i. 402 ; ii.22 



Squirrel-corn i. 46 



St. John's-wort i. 84 



St. Peter' s-wort i. 84 



Stachys ii. 79i 



