INDEX AND GLOSSARY 



573 



Ribes, 517 (Figs. 423, 424). 



Riccia, 365 ; archegonia of, 367 (Fig. 



311) ; sporogonium of, 368, 488. 

 Ricciocarpus, sporogonium of, 369 



(Fig. 313). 

 Rice, analysis of, 547 ; origin of, 548. 

 Ricinus (Castor Oil), 10 (Fig. 4) ; hypo- 



cotyl after thickening, 49 (Fig. 36) . 

 Rivularia, 457. 

 Roller-milling, 547. 

 Roots and Shoots, analysis of, 541. 

 Root, 7, structure of. Chap. v. ; 



activity of, 92 ; secondary thicken- 

 ing of, 80 (Fig. 63) ; mechanical 



construction of, 73 (Fig. 55), 158 



(Fig. 119); storage in, 164 (Fig. 123); 



symmetry of, 167 ; modified as 



suckers in Dodder, 192 (Fig. 143) ; 



of Fern, 333 (Fig. 273). 

 Root-cap, the pad of tissue con- 

 stantly renewed which covers the 



growing point, 78 (Figs. 60, 61) ; 



starch-grains in, 125 (Fig. 87 bis). 

 Root-hairs, 8, 71 (Fig. 53), 72 (Fig. 



54). 75 (Fig. 57)> 76 (Fig. 58) ; 



infection of Bean-root through, 



205, 206 (Fig. 156). 

 Root-parasitism, as in Yellow-rattle, 



188 (Fig. 140). 

 Root-pressure, 89 (Fig. 66). 

 Root-system, 8 ; symmetry of, 167. 

 Root-tip, structure of, 77 (Figs. 60, 



61) ; receptive of stimulus of gravity, 



125. 

 Rope-requirement, of roots, 158 (Fig. 



119). 

 Roripa, root-cap of, 126 (Fig. 87 bis). 

 Rosa canina, 521. 

 Rosa livida, nucellus of, 261 (Fig. 



208). 

 Rosaceae, leaf-arrangement of, 171 ; 



floral construction of, 233 (Fig. 



182), 518. 

 Rosales, 493, 518. 

 Rose of Jericho, seed-dispersal in, 



292. 

 Rostellum, of Orchis, abortive third 



lobe of stigma, 499 (Fig. 402). 

 Rubia perigrina (Wild Madder), 



straggling habit of, 180. 

 Rubus idaeus, floral construction of, 



233 (Fig. 182). 

 Runner of Strawberry, an elongated 



axillary bud, 213 (Fig. 160). 

 Ruscus (Butcher's Broom), root of, 



158 (Fig. 119). 

 Rust-Fungi, 422 (Figs. 375-384)- 



Rust of Wheat, 409, 443 (Figs. 375- 



383). 

 Rusts, 441 ; immunity of wheats 



against, 449. 

 Rye, ovary attacked by Claviceps, 



406 (Fig. 341) ; flowers of, 436 



(Fig. 369) ; analysis of, 547 ; 



origin of, 548. 

 Rye-grass, 492. 503 (Fig. 406). 



Sage, 533 (Fig. 439). 



Sageretia, straggling by help of 



axillary shoots, 181 (Fig. 134, i.). 

 Salicales, 492, 505. 

 Salicornia, succulence of, 178. 

 Salix (Willow), 505, 506 (Figs. 408, 



409). 

 Salsola, a spiny halophyte, 1 78 ; 



wind-dissemination of seeds, 291 



(Fig. 237), 292. 

 Salts, enter plant by root, 86 ; in 



sap, 89. 

 Salvia, conducting tissue of style, 



257 (Fig. 205), 269 ; mechanism 



of pollination, 266 (Fig. 210) ; 



flower of, 533 (Fig. 439). 

 Sand-box Tree (Hura), explosive 



fruit of, 133 (Fig. 94). 

 Sand-sedge, burrowing tip of, 158 ; 



rhizome of, 159 (Fig. 120, A). 

 Sanio's law of cambial division, 48 



(Fig. 34)- 

 Sap-wood, 53. 



Sapindaceae, climbing habit of, 180. 

 Saprolegniae, 410. 

 Saprophyte, an organism that derives 



organic supply from the substance 



of some dead organism, or from the 



products of its decay, 187. 

 Saprophytic Fungus, in mycorhiza, 



197 ; initiative of, 203 ; habit of 



fungi, 402 ; life in Euglena, 375. 

 Sarcina, cubical packet-form of 



Bacteria, 458. 

 Sarcodes, cctotrophic mycorhiza of, 



195, 196 (Figs. 147, 148). 

 Sarcophycus, 385. 

 Sarracenia, 207. 

 Saxifraga, vegetative propagation of, 



213, 214 ; flower of, 254 (Fig. 202) ; 



517 (Fig. 422). 

 Saxifragaceae, 517. 

 Saxifragales, 493. 5i<^- 

 Scalariform tracheides, of Fern, ^2 



(Figs. 270. 271). 

 Scapania, structure of, 366 (Fig. 310). 



