INDEX. 



211 



Pollination, 30. 

 Polypetalous, 162. 

 Polysepalous, 162. 

 Poppy, corn (Papaver Rhceas), 



150; fruit of, 164, fig. 48. 

 Prickles, 114 ; of roses and 



brambles, no. 



Primary cortex, 45 ; wood, 51. 

 Primordial, or naked cell, 34. 

 Primrose flower, structure of, 



137; fruit of, 163, fig. 47. 

 Promycelium spores, 83. 

 Protection against climate, 98; 



against living enemies, 113. 

 Protective arrangements, 90. 

 Proterandrous, 135. 

 Proterogynous, 135. 

 Prothallus, 122. 

 Protoplasm, 32. 

 Protozoa, 6. 

 Puccinia graminis, life-history 



of, 82, 85, fig. 24. 

 Purification of atmosphere by 



plants, 70. 



Rafflesia, 81,82. 



Eaphides, 36. 



Relationship amongst plants, 



158. 



Eeproduction in plants, 116. 

 Eeproductive phase of plant-life, 



5- 



Eespiration, 28, 70. 

 Eoot-hairs, 58. 

 Eoot, uses of, 26. 

 Eoots of seaweeds, 15. 

 Eose no. 



Eotation of crops, 59 ; of proto- 

 plasm, 35. 

 Eush (Juncus), 33. 

 Eussia matting, 51. 

 Eust of wheat, life history of, 82. 



Sage (Salvia scalarea), 143, fig. 

 42 ; mode of fertilization, 



143- 



Sap-cavity, 32. 

 Saprophytes, 86. 

 Scalariform cells, 34. 

 Seaweed (Fucus vesiculosus), 95, 



fig. 2. 



Seaforikta elegans, 46, fig. 14. 



Secondary wood, 57. 



Section of stem of BceJimeria 

 argentea, 52, fig. 18. 



Seeds, 31. 



Self-fertilization, 23. 



Sepals, 30. 



Sessile, 152. 



Sieve-plates, 51. 



Sieve-tubes, 51. 



Sigillaria, 190. 



Solar light, composition of, 65 ; 

 spectrum, 65. 



Special creation, 7. 



Species, 10; of plants, 185. 



Spiderwort (Tradescantia 8 el- 

 lei), section of stem, 50, fig. 



17. 



Spiral vessels, 51. 

 Sporangia, 122. 

 Spore, 122. 

 Sports, 17. 

 Stamens, 30. 



