INDEX OF TERMS 215 
Radical, 69, 
Radicle, 1. 
Rama, 69. 
Raphides, 23. 
Receptacle, 79, 
Reniform, 71. 
Replum, 99. 
Reserve material, 139, 
Respiration, 140. 
Respiratory cavity, 75. 
Reticulate venation, 67, 
Reiuse, 70. 
Bhachis, 69. 
Rhizome, 40. 
Ringent, 84. 
Rings, annual, 52, 
Root, branches, 31. 
— cap, 29, 33. 
— elongation of, 157, 
— forms, 31. 
— hairs, 3, 38, 125, 
— pressure, 127. 
— structure, 34. 
Rosaceous, 83. 
Rotate, 84. 
Runcinate, 72. 
Runner, 89. 
SaccaTs, 81, 
Sagittate, 71. 
Samara, 98. 
Sap (see cell-sap). 
Saprophytes, 145. 
Schizocarp, 98. 
Sclerenchyma, 25, 
Scorpioid, 57. 
Scutellum, 7. 
Secondary nucleus, 119, 
-— thickening, 49. 
Seed, Broad bean, 1. 
— Castor oil, 3. 
— Date, 13. 
— Maize, 5. 
— Mustard, 7. 
— Onion, 13. 
— Pine, 9. 
— Pumpkin, 11. 
— Sunflower, 7. 
Self-pollination, 109, 117. 
Self-sterility, 113. 
Sepal, 79, 81. 
Septicidal, 99. 
Septifragal, 99. 
Serrate, 71. 
Sessile, 62, 85. 
Sieve-tubes, 25. 
Silicula, 99. 
Siliqua, 99. 
Simple fruit, 97, 
— leaf, 69. 
Sinuate, 71. 
Solitary flower, 92. 
Spadix, 92. 
Spathe, 91. 
Spathulate, 71. 
Species, 163. 
Spike, 92. 
Spindle, 69. 
Spiral vessels, 25, 
Spongy parenchyma, 74, 
Spurred, 81. 
Stamen, 84. 
Staminate flowers, 80, 
Staminode, 85. 
Standard, 178. 
Starch, 22. 
Stems, 39, 
— elongation of, 157. 
— forms of, 39, 
Stigma, 87. 
Stimulus, 148, 
Stipulate, 63. 
Stipule, 63. 
Stolon, 40. 
Stomata, 64, 75. 
Style, 87. 
Suberin, 21, 53. 
Subterranean stem, 39, 
Succulent fruit, 99, 
Sucker, 40. 
Sulphur, 123. 
Superior ovary, 81. 
Symbiosis, 145. 
Sympodium, 57. 
Syncarpous, 87. 
Synergidae, 118. 
Syngenesious, 85. 
TANNIN, 23. 
Tap root, 3. 
Tendrils, 72, 152. 
Terminal bud, 46. 
— flower, 92, 
Ternate, 72. 
Testa, 1. 
Tetradynamous, 86, 
