INDEX 



625 



Ribes (Currant, Gooseberry), 80, 186, 



242, 248, 252, 258, 349 

 — . distribution of, 186, 187 

 Rice, see Oryza satii'a 

 Richards, P. W., xviii, 424, 465, 471 

 Richardson's Willow, see Salix richard- 



sonii agg. 

 Ridley, H. N., loi, 112, 114, 115, 127 

 Rigid Sedge, see Carex bigeloivii agg. 

 Rill erosion, 309 

 Rissoella verruailosa, 530 

 River banks, 374, 431, 452 

 Rivers, benthos of, 498-9 

 — , dispersal by, 107-8, 489 

 Riviilaria, 28 



R. haematites, 495 

 Roach, 117 



Robbins, W. W., 253, 281 

 Roches moutonnees (sheep rocks), 546 

 Rock, corrosion of, 326, 494 

 — , oldest known, 128, 145 



— Sedge, see Carex rupestris 



— surface, colonization of, 325, 326, 



327. 407, 4". 416, 5 14, 522, 524, 533 

 Rockweed, see Fucus 

 Rocky Mountains, 346, 377, 414 

 Root, 12, 32, 90, 91, 302-3, 437, 438, 



451, 484,485 

 — , aerial, 433, 434, 435, 436, 470 

 — , climbing, 89, 431 

 competition, 81, 365, 428, 432, 442 



— crops, 229-32, 257-8 

 — , drugs from, 264 



— growth, 82 



parasite, 437, 452 



system, 85, 137, 364, 432, 458 



— , toxic excretion from, 80 

 Rooting, deep, 76, 82, 84, 450, 451, 458 

 Roots, inflated, 86, 87 

 Rootstock, 69 



Rorippa nastuytiiim-aquaticum (Water- 

 cress), 258 

 Rosa (Rose), 112, 275 



R. damascena (Damask Rose), 275 

 Rosaceae (Rose family), 417 

 Rose family, see Rosaceae 



— of Jericho, see Anastatica hiero- 



chuntina 



— oil, 275 



Rosemary, see Rosmarinus officinalis 



Rosette hemicryptophyte, 94 



Roseveare, G. M., 471 



Rosin, 269, 273 



Rosmarinus officinalis (Rosemary), 275, 



355 

 Ross, R., xvui, 476, 477, 481 

 Rostkovia magellanica, 421-2 

 Rotation of crops, 279, 311, 557, 57° 

 Rotenone, 276 



Rothamsted Experimental Station, 223 

 Rotifers, 486 



Royal Fern, see Osmunda regalis agg. 



Rubber, 3, 239, 272, 282 



Rubel, E., 23 



Rubiaceae (Madder family), 430 



Rubner, K., 451 



Rubus (Blackberry, Bramble), 258, 342 

 R. chamaemorus (Baked-apple), 406 

 R. idaeus (Raspberry), iii, 258 



Rudolph, L., 22 



Rumex acetosella agg. (Sheep Sorrel), 



249, 577. 

 Run-oft", erosion by, 289, 555 

 Runner, 69, 121, 122, 123 

 Running plants, 87, 89, 121 

 Rush, see Junciis and Juncaceae 

 Russell, E. J., 335 

 — , E. W., 335 

 Russia, 77, 360, 361, 365 

 Russian-thistle, see Salsola kali var. 



tenuifolia and S. pestifer 

 Rusts {see also Fungi), 43, 280 

 — , cereal, 251 

 Rutabaga (Swede), 231 

 Ruttner, F., 487, 501, 506 

 Rye, see Secale cereale 



Saccharomyces (Yeast), 43, 44, 45, 46, 



260, 269, 499 

 Saccharomycetaceae (Yeasts), i, 278, 



418 

 Saccharum officinarutn (Sugar Cane), 



239, 241, 269, 282 

 Sacred Lotus, see Nelumbo nucifera 

 Safflower, 274 



— oil, 265 

 Saffron, 262, 274 

 Safrole, 264 

 Sage, 262 



brush, see Artemisia tridentata 



area, 364 



Sago, 269 



Saguaro, see Carnegiea gigantea 



Sahara Desert, 102, 156, 449, 450 



, sea in Cretaceous times, 156 



, semi-desert areas of, 365 



, semi-desert scrub near, 447 



Sahuaro, see Carnegiea gigantea 

 St. Helena, endemism in, 205 

 Sake, 261 



Sal-tree, see Shorea robusta 

 Salad Burnet, see Poterium sanguisorba 

 Salicornia (Glasswort, Saltwort), 368 

 Saline habitat, 316, 368-70, 399, 454, 

 502 



— soil, 301, 365, 366, 368-70, 450 



— waters, inland, 369-70, 489, 492, 502 

 Salinity, 316, 318, 368, 456, 460, 472, 



489, 507, 537, 560 

 — , fluctuating, 474, 502 

 — , variation in, 507-8, 522-3, 531, 533. 



537 



