PLANTS o# IOWA 



Skull-cap 209 



Small 209 



Marsh 209 



Veined 209 



Slender Parosela 183 



Slender Ladies' Tresses 153 



Slender Fimbristylis 141 



Slender Cotton-grass 142 



Slender Button-snakeroot .... 224 



Sycamore 176 



Slime Moulds 7 



Small Wild Bean 186 



Small Bed-root 191 



Smaller Enchanter 's Night- 

 shade 197 



Small Melic-grass 136 



Small Wild Bean 186 



Small-flowered Leaf -cup 230 



Small Flowered Coral Boot... 154 



Smartweed 160 



Smilax 151 



Smuts 51 



Smoother Sweet Cicely 198 



Smooth Hedge Nettle 210 



Smooth Euellia 217 



Snowberry 219 



Snake-root 198 



Clustered 198 



Short-styled 198 



Large-fruited 198 



Button 198 



Snake-head 213 



Soapwort 164 



Southwestern Persicaria 161 



Solomon 's Seal 150 



Star-flowered 150 



Two-leaved 151 



Hairy 151 



Smooth 151 



Spike-rush 140 



Purple 140 



Ovoid 141 



Creeping 141 



Needle 141 



Wolf's 141 



Matted 141 



Spring Scorpion-grass 207 



Spring Beauty 164 



Spring Bock Selaginella 124 



Spreading Chervil 198 



Spotted Touch-me-not 191 



Spear Grass 137 



Weak 137 



Sylvan 137 



Wolf's 137 



Spurge 188 



Geyer's 188 



Bound-leaved Spreading . . . 188 



Thyme-leaved 188 



Bidge-seeded 188 



Upright 189 



Flowering 189 



White-margined 189 



Toothed 189 



Various-leaved 189 



Blunt-leaved 189 



Beticulate-seeded 189 



Petty 189 



Tinted 189 



Cypress 189 



Spreading Aranche 162 



Spiderwort 147 



Beflexed 148 



Short-stemmed 148 



Spider Flower 174 



Spear-mint 211 



Spiny Sow-thistle 222 



Speedwell 214 



Water 214 



Skull-cap 214 



Thyme-leaved 215 



Purslane 215 



Corn 215 



Squirrel Corn 170 



Squirrel-tail Grass 139 



St. John's-wort 193 



Great 193 



Shrubby 193 



Bound-fruited 193 



Common 193 



Spotted 193 



Dwarf 193 



Clasping-leaved 193 



Canadian 193 



DrummondV 193 



Marsh 193 



Strawberry 177 



Wild 177 



Scarlet 177 



Wood . 177 



European Wood 177 



Stickseed 207 



Hairy 207 



Virginia 207 



Nodding 207 



Stemless Loco Weed 184 



Staff -tree 190 



Stalked Water Hoarhound 211 



Stonecrop 174 



Star Grass 152 



Sumac 189 



Staghorn 189 



Smooth 189 



Sweet-scented 189 



Swamp Lousewort 216 



Swamp Squaw-weed 235 



Sweet Scented White Water 



166 



