434 



INDEX 



Quercus, 236, 291-4, (Figs. 192- 



4). 

 Quicken-tree, 298. 

 Quick-grass, 125, 140. 

 Quince, 244. 



Raceme, 15, 194, (Fig. 133). 

 Radicle, 20, 21, 22, 23. 



pocket, 20-1. 

 Radicula.. 343. 



Radish, 35, 59, (Fig. 26), 125, 

 238. 



Horse, 238. 

 Ragged Robin, 239, 370, 376. 

 Ragwort, 262-3, 370, 380. 

 Ranunculaceae, 236, 242, 248. 

 Ranunculus, 236-7, 343, 378, 380. 

 Raphanus, 378. 

 Raspberry, 62, (Fig. 27), 122, 



217, 225, 242-3. 

 Ray-florets, 178-80. 

 Receptacle, 15, 16. 



-cup, 170, 171. 

 Reed, Common, 371, (Fig. 240), 



376. 

 Region of elongation : 



in roots, 45, 46, (Fig. 21). 



in shoots, 47 (Fig. 22). 

 Replum, 17. 

 Reproduction, vegetative, 140-2. 



in aquatic plants, 374. 

 Reproductive organs, 14-18, 



206-1 1 . 

 Respiration, 43, 44, 107. 

 Rest-harrow, 246, 379, 380, 386. 

 Revolute, 119. 

 Rhinanthus, 256, 379. 

 Rhizomes, 125-8, (Figs. 79-81 



and no). 

 Rhododendron, 89, 93, 119. 

 Ribwort {see Plantain), 105, 106. 

 Rice, 265. 

 Roan-tree, 298. 

 Rock-plants, 383. 

 Rock Rose, 368. 

 Root, 12. 



abnormal, 59-60, (Fig. 26). 



absorption by, 48, 57. 



aerial, 60. 



aquatic, 60. 



bast (phloem) of, 35. 



-branches, 12. 



cambium of, 35. 



Root-cap, 12, 58. 



contact stimulus, 40. 



contractile, 134, (Fig. 84), 

 139. (Fig. 87). 



cortex of, 34. 



curvature of, 46, 47. 



dicotyledonous, 34-6. 



direction of growth, ^, 38. 



effect of dry and moist soils 

 on, 42. 



effect of light on, 42-3. 



endodermis of, 35. 



environment of, 64. 



epidermis of, 34. 



excretion by, 49. 



forms of, 58-64. 



geotropism, 38-40. 



growing region of, 45-6. 



-hair region, 48. 



-hairs, 12, 27, 48, 62. 



hydrotropism, 41-2. 



monocotyledonous, 32, 36-7. 



-nodules, 245, 326, 356. 



old, 34. 



oxygen necessary for, 43, 44. 



pericycle of, 35. 



-pressure, 97-8, (Fig. 60). 



secondary growth, 35, 36. 



sensitiveness of, 38-47. 



sensory region of, 40, 41. 



separation layer, 139. 



stele or central cylinder, 35. 



storage of food by, 59, 60. 



structure of, 34-7. 



-system, 12. 



tap, 12, 58, 59. 



tissues, 34-7. 



tuberous, 60, 62, (Fig. 28). 



vascular system of, 35. 



wood (xylem) of, 35. 



work of, 37-58. 



young, 35, 36. 

 Rosa, 244, 387. 

 Rosaceae, 242-4. 

 Rose, 62,90, 116, 122, 170, (Fig. 

 114), 171, 174, 193, 210, 

 212-14, (Fig. 146), 219, 225, 

 244. 



Burnet, 387. 

 Rosemary, 252. 



Rosette plants, 105, 106, (Fig. 

 59), 250, 344, 398, (Fig. 257). 

 Rosmarinus, 252. 



