Spring Flora of Oklahoma 
237 
Simple-leaved Ampelopsis _ _ 106 
Sisyrinchium _ 15 
Sisymbrium _ _ 54 
Sitilias __ 185 
Slender Bladder-pod _ 52 
Slender Beard-tongue _ 163 
Sleepy Oatchfly - 43 
Slender Heliotrope _ 145 
Slender Milk Vetch _ 80 
Slender Plantain _ 170 
Slender Rough Fleabane _ 192 
Slippery Elm _ 29 
Small Bluet _ 172 
Small Bindweed _ 140 
Small-fruited False-flax _ 53 
Small-flowered Phacelia _ 143 
Small-flowered Verbena! _ 149 
Small Skullcap _:_ 152 
Small Venus’ Looking-glass _ 179 
Smilaceae __ 10 
Smilax _ ____ 10 
Smilax Family _ 10 
Smoothish Chamsesaracha _ 159 
Smooth Ruellia _ 167 
Smooth Solomon’s Seal - 10 
Smooth Upland Sumac _ 96 
Smoothish Yellow Violet _ 112 
Sneezeweed _ 201 
Snow-on-the-mountain ___ 94 
Soapberry Family _ 103 
Soap-weed __ 6 
Solanacese _ 156 
Solanum _____ 159 
Sonchus ___— 184 
Sophora __ 72 
Sophia f __ 56 
Southern Black Haw _ ' _ 175 
Southern Fox Grape _1_ 106 
Sour Gum _ 127 
Spatulate-leaved Fog-fruit _ 150 
Specularia __ 179 
Spermolepis _ 124 
Spiderwort Family _ 2 
Spiderwort __ 3 
Spiderwort, Reflexed _ 3 
Spiderwort, Western _ 3 
