197 



Sphagnacese, 137. 

 Sphagnum, 137, 170. 

 Spice Bush, 93. 

 Spiked Loosestrife, 55. 

 Spiljenard, 57. 

 Spii'Eea, 48. 

 Spiranthes, 108. 

 Splachnum, 170. 

 Spongiocarpese, 160. 

 Sporobolus, 123. 

 Spotted Cowbane, 5G. 

 Spotted Wintergreen, 74. 

 Spreading Dogbane, 87. 

 Spring Beauty, 40. 

 Spring Clotbur, 65. 

 Spring Cress, 33. 

 Spurge Family, 94. 

 Spyridia, 161. 

 Spyridieae, 161. 

 Squamarieae, 160. 

 Sqnirrel-tail Grass, 128. 

 Stachys, 83. 

 Staff Tree Family, 43. 

 Staghorn Sumach, 42. 

 Star Cucumber, 55. 

 Star-flower, 75. 

 Star-flower (Houstonia), 60. 

 Star Grass, 110. 

 Statice, 75. 

 Steironema, 76. 

 Stellaria, 38. 

 Stereocaulon, 153. 

 Stipa, 124. 

 Stitchwort, 38. 

 Stone-crop, 52. 

 Stone- root, 82. 

 Slorksbill, 41. 

 Stramonium, 86. 

 Strawberry, 49. 

 Strawberry Elite, 90. 

 Strawberry Tomato, 85. 

 Streptopus, 111. 

 Stricta, 151. 

 Striped Grass, 129. 



Striped Maple, 43. 

 Struthiopteris (Onoclea), 135. 

 SusEda, 90. 

 Sugar Maple, 43. 

 Sumach, 42. 

 Summary, 173. 

 Summer Grape, 42. 

 Sundew Family, 36. 

 Sundrops, 54. 

 Sunflower, 65. 

 Swamp Beggar-ticks, 66. 

 Swamp Blueberry, 71. 

 Swamp Hickory, 96. 

 Swamp Honeysuckle, 73. 

 Swamp Loosestrife, 65. 

 Swamp Maple, 43. 

 Swamp Milk-weed, 88. 

 Swamp Eose, 50. 

 Swamp Hose Mallow, 40. 

 Swamp Saxifrage, 51. 

 Swamp Thistle, 68. 

 Swamp Violet, 35. 

 Swamp White Oak, 97. 

 Sweet Alyssum, 34. 

 Sweet Birch, 98. 

 Sweet Brier, 50. 

 Sweet Cicely, 19, 57. 

 Sweet Fern, 98. 

 Sweet Flag, 103. 

 Swoet Gale, 98. 

 Sweet Gale Family, 98. 

 Sweet Goldenrod, 64. 

 Sweet-scented Bedstraw, 59. 

 Sweet Vernal Gra.ss, 129. 

 Sweet White Violet, 35. 

 Sweet William, 37. 

 Sweet William Catchfly, 38. 

 Symphitum, 83. 

 Symphoricarpus, 58. 

 Symplocarpus, 103. 

 Syringa, 88. 



Tall Buttercups, 30. 

 Tall Meadow Eue, 29. 



