INDEX 



Spirogyra, s 6. 



Spore, 53, 57, 59, 83, 160, s 6, 7, 31, 



32, 33, 42, 44, 45, 47, 48. 

 Spore-Case (Sporangia), 74-84, Fig, 



30, p. 84, s 45-47. 

 Spore Distribution, s 45. 

 Spore Fruit, s io,.32, 33, 34. 

 Sporophyte, s 42. 

 Spurry, s 125. 



Squash, 29, 31, Fig. 7, p. 30. 

 Stachys, s 86. 

 Squirrels and Seeds, 27. 

 Stamen, Definition of, 87, s 49. 

 Starch, 19, 38, s 5, 6, 18, 19. 

 Star Thistle, 210, Fig. 72, p. 206, 



s 94, 125. 

 Star Tulip, s 74. 



Stellaria, s 55, 125. See also Chick- 

 weed. 



Stem Structure, s 58. 

 Stephanomeria, s 25. 

 Stipelia, s 114. 

 Stigma, Definition of, 87. 

 Stink-Horn Fungus, s 36. 

 Stipa, s 1 06. 

 Stipules (Pair of organs at base of 



leaf stem), s 59 

 Stomata, 36, 37, 42, 43, Fig 10, p. 



56, s 17, 23. 

 Storehouse, Underground, 39, 64- 



68, 72-85, 89, 93, 97, no, 183, 



Fig. 22, p. 65. 

 Stramonium, s 73. 

 Strawberry, 179, 180, s 62. 

 Strychnine, s 114. 

 Style, Definition of, 92. 

 Sugar Beet, s no. 

 Sugar Cane, 168, s 106. 

 Sugar Pine, s 100. 

 Sumac, 177, s 64. 

 Sumatra. 60, s 104. 

 Summer Flowers, 183-199. 



Summer Plants, 39-50, 196-199. 

 Sundew, 176, s in, 112. 

 Sunflower, 44, 151-154, 201, 208, 



Fig. 58, p. 152, S9E, 96. 

 Superior Ovary, 163. 

 Sweet Alyssum, 175, s 68. 

 Sweet Flag, s 104. 

 Sweet Potato, s 114. 

 Switch Plants, s 24. 

 Sword Fern, 81, Fig. 28, p. 78 

 Sycamore, 71, 104, 172, Fig. 38, p 



103, s 28, 41, 57, 59, 60. 

 Sympetalae, s 113. 

 Symphoricarpus, s 65. 



Talipot Palm, s 104, 105. 



Tan-Bark Oak, s 108. 



Tansy, 393. 



Tapioca, 178. 



Tar- Weed, 42, 44, 197, 201, 207, s 



25, 89, 92. 



Taste of Plants, 41, 68, s 22. 

 Tea Plant, 176, s 112. 

 Teasel, s 114. 

 Tellima, s 75. 

 Tendril, s 122. 

 Thistle, 151, 155, 182, Fig. 59, p. 



156, 393. 



Thistle-leaved Salvia, 146, 148. 

 Thrips, 92. 

 Thysanocarpus, s 68. 

 Thyme, s 114. 



Tid'y-Tips, 151, 154, s 75, 91, 125. 

 Tiger Lily, 163. 

 Toad-Stool, 57-59, Fig. 19, p. 58, s 



34-35- 



Tobacco, s 73, 113. 

 Tocalote, 210. 

 Tomato, s 73, 113. 

 Topping Trees, s 57. 

 Tradescantia, s 104. 

 Transpiration, s 14, 23. 



