Sedge Family, 115. 
Sedum, 52. 
Seed-box, 54. 
Selaginella, 131. 
Self Heal, 82. 
Sempervivum, 52. 
Senecio, 67. 
Sensitive Fern, 135. 
Sensitive Plant, 47. 
Sericocarpus, 61. 
Setaria, 130. 
Shadbush, 51. 
Shagbark Hickory, 96. 
Sheep-berry, 59. 
Sheep’s Fescue, 127. 
Sheep Sorrel, 92. 
Shepherd’s Purse, 34. 
Shining Willow, 100. 
Shin-leaf, 74. 
Showy Orchis, 107. 
Shrubby Althzea, 40. 
Shrubby Cinque-foil, 49. 
Sickle-pod, 33. 
Sicyos, 55. 
Side-saddle Flower, 32. 
Silene, 38. 
Silkweed, 87. 
Silky Cornel, 58. 
Silky Willow, 99. 
Silphium, 64. 
Silver-weed, 49. 
Silvery Cinque-foil, 48. 
Siphonee, 165. 
Sisymbrium, 33. 
Sisyrinchium, 110. 
Sium, 56. 
Skull-cap, 82. 
Skunk Cabbage, 103. 
Sleepy Catchfly, 38. 
Slender Blue Flag, 110. 
Slippery Elm, 94. 
Small Bedstraw, 59. 
Small Bitter Cress, 33. 
Small Bugloss, 83. 
196 
Small Cranberry, 71. 
Smaller Solomon’s Seal, 112. [109. 
Smaller Yellow Lady’s Slipper, 
Small-flowered Crowfoot, 30. _ 
Small-flowered Sweet Brier, 50. 
Small Magnolia, 31. } 
Small Nettle, 95. 
Small Pansy, 36. 
Smilacez, 110. 
Smilacina, 111. 
Smileecina bifolia, 112. 
Smilax, 110. 
Smilax Family, 110. 
Smooth Sumach, 42. 
Smooth Sweet Cicely, 57. 
Smooth Winterberry, 74. 
Snake-head, 78. 
Snapdragon, 78. 
Sneeze-weed, 66. 
Sneezewort, 66. 
Snowberry, 58. 
Soapberry Family, 43. 
Soapwort, 37. 
Soft Chess, 127. 
Soft Rush, 1138. 
Solanacee, 8d. 
Solanum, 85. 
Solidago, 63. 
Solieria (Rhabdonia), 160. 
Solomon’s Seal, 112. 
Sonchus, 69. 
Sorghum, ‘130. 
Sorrel, 41. 
Sow Thistle, 69. 
Sparganium, 104. 
Spartina, 125. 
Spearmint, 81. 
Speckled Alder, 99. 
Specularia, 71. 
Speedwell, 79. 
Spergula, 39. 
Spergularia (Lepigonum), 39. 
Sphacelaria, 164. 
Spherococcoidee, 159. 

