INDEX. 



81' 



Silphium integrifoliurn var. 



laeveT. andG 532 



Silphium lacimatum LINN 532 



Silphium laevigatum PURSH.. 532 



Silphium perfoliatum LINN 531 



Silphium scabrum MOENCH. . . 531 



speciosum NUTT 532 



spicatum Pom 532 



Silphium terebinthinaceum 



JACQ 532 



Silphium tetragonum MOENCH 531 



SiphisiaRAF 201 



glabra RAF 202 



sipho KLOTZSCH 202 



Sisarum TAUSCH 391 



Sisarum TOUKN 396 



Sismondea DELPON 160 



Sison canadense LINN 397 



marginatum MICHX 391 



trifoliatum MICHX 392 



Sisymbrella SPACH 257 



Sisymbrium LINN 257 



Sisymbrium arabidioidesHooK 265 



brachycarpum H. and A. 258 



californicum WATS 258 



canescens BENTH 258 



canescens var. brachycar- 

 pum UPH 258 



canescens KUTT 258 



canescens var. brevipes 



T. and G 258 



dentatum TOUR 258 



Sisymbrium h artwe gia n u m 



FOURN 258 



Sisymbrium hispid um POIR. . . 259 



humifusum J. VAHL. . . 265 



incisum var. hartwegia- 



num WATS 258 



Sisymbrium multifidum (PuRSii) 258 



Sisymbrium nasturtiumWALT. 261 



palustre LEYS 2tO 



pinnatum GREENE 258 



sophia G RAY 258 



Sisyrinchium LINN 161 



Sisyrinchium anceps CAV 162 



angustifolium AUCT. in 



part 161 



Sisyrinchium an gust ifo I i um 



MILL 162 



Sisyrinchium bermudiana 



MICHX 162 



gramineum LAM 162 



Sisyrinchium m uc ronatum 



MICHX 161 



Sitanion RAF 87 



elymoides RAF 87 



Sitocodium SALISB 151 



Sium LINN 396 



angustifolium LINN 396 



Sium canadense LAM 397 



Sium cicutaefolium K. C. GMEL . . 396 



Sium i?)douglasii DC 395 



latifolium BIGEL 396 



lineare MICHX 396 



Sium pumilum NUTT 396 



rigidius LINN. 391 



rugosum RAF 396 



suave WALT 396 



tenuifolium MUHL 396 



Skofltzia HASSK 130 



Smilacina DESF 152 



bifolia DESF 152 



bifolia \ 7 ar. canadense 



GRAY 152 



borealis PURSH 151 



canadense PURSH 152 



ciliata PL-USH 154 



racemose DESF 154 



- stellata DESF 153 



Smilacina trifolia DESF 153 



Smilax LINN 1 57 



Srailax aspera DC 158 



caduca LINN 158 



ciliata STEUD 158 



Smilax echirrata WATS ]o8 



Smilax grand i folia BUCKL . . 157 



Smilax herbacea LINN 158 



Smilax herbacea var. pulveru- 



lenttii GRAY 158 



herbacea var. pulveru- 



len ta (Micnx. ) 1 59 



Smilax hispiaa MUHL 157 



Smilax peduncularis MUHL. . . 158 



pulverulenta MICHX 158 



quadrangularis MUHL.. 158 



Smilax rotundifolia LINN 158 



Smilax rotundifolia WILLD. . . 157 



Srnyrnium aureum LINN 392 



barbinode MUHL 39:J 



cordatu m W A LT 393 



integerrimum LINN 395 



luteum MUHL 392 



nudicaule PURSH 390 



trifoliatum MUHL 393 



Solanaceae 456 



Solanites 456 



Solatium LINN 458 



Solanumcrenato-dentatumDC 459 



Solanum nigrum LINN 459 



Solanum pterocaulon DC 459 



ptycanthuiu DC 459 



Soleirolia GAUDICH 199 



Solenachne STEUD 69 



Solenostigma ENDL 194 



Solidago KUNTZE 516 



Solidago LINN 508 



Solidago altissima AIT 512 



altissima T. and G 512 



amplexicaulis MART 509 



angulata SPRENG 512 



arguta T. and G. 512 



arguta var. juncea GRAY 512 



aspera AIT 512 



asperata PURSH 512 



asperata SOLAND 512 



asperula DESF 512 



Solidago caesia Linn 514 



canadensis LINN 510 



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