Silphium integrifolium var. 
laeve T. andG........ 
Silphium laciniatum LINN..... 
Silphium laevigatum PurRsH.. 
Silphium perfoliatum LINN.... 
Silphium scabrum Moencn... 
——speciosum NUTT........ 
——spicatum PoIR.......... 
Silphium tevebinthinaceum 
JACQ. 
Siphium tetragonum MoENCH 
Siphisia RAF. ................ 
—glabra RAF............. 
—sipho KLorzscH 
Sisarum TAUSCH....... ..... 
Sisarum TOURN.............. 
Sismondea DELPON........... 
Sison canadense LINN........ 
—marginatum Micnx.... 
—trifoliatum MIcHx..... 
Sisymbrella SPACH.. ......... 
Sisymbrium LINN............. 
Sisymbrium arabidioidesHook 
—brachycarpum H.and A. 
—californicum WarmTs..... 
—canescens BENTH.. .... 
—canescens var. brachycar- 
pum UPH............. 
—canescens NUIT........ 
=—canescens var. brevipes 
DP. ANG Gs caseneawee 
——dentatum Torr........ 
Sisymbrium hurtwegianum 
FOuRN. 
Sisymbrium hispidum Porr... 
—humifusum J. VAHL... 
——incisum var. hartwegia- 
DUM. WATS ocsice oc 
Sisymbrium multifidum (PuRSH) 
Sisymbrium nasturtium WALT. 
-— palustre LEYS......... 
—pinnatum GREENE..... 
—-sophia GRAY............ 
Sisyrinchium LINN......... ++ 
Sisyrinchium anceps CAv..... 
— angustifolium AUcT. in 
DATE, < aseiarecsaicides pte aot 
Sisyrinchium angustifolium 
MILL 2... seen eee ee 
Sisyrinchium bermudiana 
—gramineum LAM........ 
Sisyrinchium mucronatum 
MICH i433 seewnaan deen 
Sitanion RAF........-..5..66. 
—elymoides RAF.......... 
Sitocodium SALISB........ «++ 
Sium LINN... 0.6 e ec cee cree eee 
—angustifolium LINN...... 
Sium canadense LAM......... 
Sium cicutaefolium K.C. GMEL. . 
Sium (?)douglasii DC......... 
——latifolium BIGEL. ...... 
—lineare MICHX.......... 
~52 
INDEX. 
Sium pumilum Nurr......... 
532 —rigidius Linn. ner 
532 —-rugosim RAF..... be see 
532 —suave WALT .......... 
531 ——tenuifolium Mum...... 
58 Skotitzia Hassk... 0.00... 
532 Smilacina DEsr.  ... ....... 
532 —hbifolia DEsr ..... bd ge 
—bifolia var. canadeuse 
532 GRAN 5 wciitaail Badinws vars 
531 ——borealis PursH. .... 
201 ——canadense PURSH....... 
202 === elliata PURSTiaens 26 snes 
202 --—racemosa:DESF ......... 
B9t — stellata DESF........... 
396 Smilacina trifolia Desr....... 
160 Smilax LINN.................. 
397 Smilax aspera DC............. 
391 —caduca LINN............ 
392 —— ciliata SrEUD 
257 Smilax echirrata Wars ....... 
257 Smilax grandifolia BUCKL 
245 Smilax herbacea LINN......... 
258 Smilax herbacea var. pulveru- 
258 lenta GRAY........... 
258 ——herbacea var. pulveru- 
lenta (MICHN.)........ 
258 «Smilax hispida MUHL......... 
258 Smilax peduncularis MuuL... 
——pulverulenta MICHX.... 
258 ——quadrangularis MUHL.. 
258 Smilax rotundifolia LiNN...... 
Smilax rotundifolia WILLD... 
258 Smyrnium aureum LINN...... 
259 —barbinode MUBHL. ...... 
265 ——cordatum WALT........ 
——integerrimum LINN, ... 
258 — luteum MURL........... 
238 —nudicaule Pursm........ 
261 ——trifoliatum Mont...... 
260 Solanaceae ................. 
258: — SOLAWMES iis sasenamea ven ganza OeK 
258 Solanum LINN.. staid, Snatee 
161 Solanum crenato-dentatun:DC 
162. Solanum nigrum LINN ........ 
Solanum pterocaulon DC..... 
161 ——ptycanthum DC......... 
Soleirolia GAUDICH...... ee 
162 Solenachne STEUD............ 
Solenostigma ENDL..... ..... 
162 Solidago KUNTZE..... ....... 
162 Svlidago LINN.........-....... 
Svlidago altissina AIr........ 
161 ——altissima T.andG...... 
87 —amplexicaulis MART.... 
87 —angulata SPRENG....... 
151 —arguta T. andG......... 
396 ——arguta var. juncea GRAY 
396 ——aspera AIT.............. 
397 ——asperata PURSH.. ...... 
396 ——asperata SOLAND........ 
395 ——asperula DESF.......... 
396 Solidago caesia Linn...?.... ., 
396 —canadensis LINN. ....... 
