INDEX 



823 



Pteridophytes, 324. 



Ptomaines, 788. 



Puccinia, 727, jzj-jy) (Figs. 245, 249). 



Fuel's vernal-grass, 531. 



Pure culture, 776. 



Purple clover, 421. 



Purple medick, 429. 



Purple melick grass, 670 (Fig. 216). 



Putrefaction, 787. 



Pyrola, 225. 



Pyrus, 65, 66, 405. 



Pythium, 693, 694 (Fig. 233), 697. 



Pyxidium, 99 (Figs. 45, 129, 130). 



Pyxis, 99. 



QUERCUS, 66, 129, 135. 

 Quince, 30, 32, 262, 263, 407. 

 Quitch, 551, 602. 



Race, 321. 



Raceme, 90 (Fig. 39). 



Racemose branching, 40 (Fig. 15). 



inflorescences, 89-92. 



Rachilla, 478 (Fig. 150). 



Rachis, 89, 479 (Figs. 39, 149). 



Radial longitudinal section, 104. 



Radicle, 10 (Figs. 2, 5, 6). 



Radish, wild, 386, 592. 



Ragweed, 608. 



Ragwort, 608. 



Ramsons, 328, 577. 



Ranunculacese, 326, 589, 605. 



Ranunculus (Figs. 21, 34), 322, 589, 



605. 

 Rape, 163, 224, 379, 381, 386. 

 Raphanus, 386, 592. 

 Raphides, 165 (Fig. 80). 

 Raspberry, 49, 65, 99, 287, 403. 

 Rattle, 102, 225, 327, 576, 610. 

 Ray florets, 471 (Fig. 147). 

 Ray-grass, 548. 

 Reading April wheat, 527- 

 Receptacle, 78, 81 (Figs. 34, 35), 91, 472. 

 Recessive character, 290. 

 Recipocral hybridisation, 289. 

 Red clover, 27, 99, 421, 423, 648 (Figs. 



128, 129, 130, 198. 



currant, 49, 64. 



fescue, 544. 



mustard, 381. 



rattle, 225, 576. 



Redwood willow, 65. 

 Reed, 205. 

 Regular flower, 80. 

 Reniform, 70. 

 Replum, 98. 



Reproduction, 258. 



of fungi, 679-681. 



of bacteria, 770-773. 



sexual, 258, 269. 



vegetative, 258. 



Reserve materials, 18, 36, 223, 227. 



Resin, 346, 



Respiration, intramolecular, 238. 



ordinary, 233. 



Rest-harrow, 437, 605. 



Resting-spores, 682. 



Reticulate, 69. 



Reversion, 299, 317. 



RkamnuSj 61, 64, 737. 



Rhinanthus^ 225, 327, 576, 610. 



Rkizohium^ 797. 



Rkizoctoniaj 707. 



Rhizome, 55 (Fig. 22), 255. 



Rhododendrons, 225. 



Ribes, 64, 65. 



Rib-grass (see narrow-leaved plantain). 



Richardia, 90. 



Rind-grafting, 266. 



Ringing of stems, 221, 222, 261 (Fig. 92). 



Ripening of cereals, 490. 



Rivet wheat, 519 (Fig. 168). 



Rock-rose, 93. 



Rodmersham hop, 341. 



Rogues, 317. 



Roots, 10, 25. 



absorption by, 183-185, 203, 204. 



adventitious, 28 (Figs. 10, 21, 144), 



SS- 



branching of, 26. 



depth of, 30. 



extent of, 30-32. 



forms of, 27, 28. 



increase in thickness, 142. 



lateral, 26. 



length of, 29. 



primary, 25. 



secondary, 25 (Fig. 9). 



structure of, 140-143. 



tuberous, 27. 



Root-cap, 149 (Figs. 72, 78). 



Root-hairs, 32 (Fig. 72), 141. 



Root-nodules, 796. 



Root-pressure, 186, 187. 



Root-stock, 55. 



Root-system, 26. 



Root-tubercles, 796. 



Rosa, 65, 404. 



Rosaceae, 327, 397-409, 606. 



Rose, 29, 51, 65, 71, 83, 97, 103, 282, 



30s, 308, 404. 

 Rose mildew, 756. 



