6 3 6 
INDEX 
Respiration, 105, in 
and fermentation, 112 
and photosynthesis, no 
versus breathing, 107 
Response, stimulus and, 125 
Rex begonia, 347, 447 
Rhizoctonia, 291, 293 
Rhizomes, 150 
Rhubarb, 116 
Ribes, 301 
Riccia, 222 
fluitans, 209 
life history of, 224 
natans, 209 
trichocarpa, 222 
Ricciales, 210 
Ricciocarpus, 223 
Ricinus, 123 
communis, 63, 66 
Robinia, 467 
Rock strata, classification of, 583 
Root, 10 
elongation of, 117 
Root-cap,*^ 
Root-hairs,"ii, 53, 54, 58 
'and soil, relation between, 52 
importance of, 49 
location of, 49 
structure of, 51 
Root-nodules, 83 
of Cycas revolutia, 333 
Root-stocks, 150 
Rosa Carolina, 464 
rugosa, 450 
Rosaceae, 464 
Rose, 465 
wild, 466 
Rosette, 40 
Rostellum, 501 
Rotation of crops, 318 
Rubber-plant, 64, 66 
Rubiaceae, 463 
Rubus australis, 28 
Rudbeckia, 533 
Rue anemone. 463 
Runners, 164, 350 
Rye, cultivated, 293 
wild, 293 
Saccharomyces, 98 
Sage, 479 
Sagittaria, 449 
Sago palm, 390 
Salix, 12, 346, 457, 458 
babylonica, 457 
discolor, 457 
Salvia, 480 
Salvinia, 341 
Salicaceae, 457 
Saltation, orthogenetic, 528 
Sanitary theory, 92 
Sanitation, 311 
Sap, nuclear, 184 
Sapium sebiferum, 84 
Saprophytes, fungus, 322 
Saprophytism, 321, 322 
Saururaceae, 459 
Saururus cernuus, 32, 459, 460 
Saussure, Nicolas Theodore de, 74 
Savory, 479 
Schleiden, 15 
Schwann, 15, 94 
Science, essence of, 620 
Scion, 335 
Scott, D. H., 619 
Scrophulariacese, 481 
Scutellum, 494 
Secale cereale, 293 
Secretions, 19 
Sedum, 31 
Seed, essentials of, 453 
Seed-coat, 397, 453 
