692 



BOTANY OF THE LIVING PLANT 



gory of, 346, 347 ; of Fern, 491-492 



(Fig. 382). 

 Root-cap, the pad of tissue constantly 



renewed which covers the growing 



point, 88 (Figs. 63, 64) ; starch- 

 grains in, 156 (Fig. 95). 

 Root-hairs, 8, 83 (Fig. 57), 86 (Figs. 



58, 60, 61) ; absorption of water by, 



98 ; infection of Bean root through, 



236 (Fig. 164). 

 Root-nodules, 235 ; details of, 236 



(Fig. 164). 

 Root-parasitism, as in Yellow-rattle, 



221 (Fig. 149). 

 Root-pressure, 108 (Fig. 74). 

 Root-system, 8 ; symmetry of, 199. 

 Root-tip, structure of, 88 (Figs. 63, 



64) ; receptive of stimulus of 



gravity, 156. 

 Roots and shoots, size-structure cor- 

 relation in, 593, 594. 

 Rope-requirement, of roots, 190 (Fig. 



126). 

 Roripa, root-cap of, 156 (Fig. 95). 

 Rosa canina, 634. 

 Rosa livida, nucellus of, 297 (Fig. 



218). 

 Rosaceae, leaf arrangement of, 205 ; 



floral construction of, 267 (Fig. 



191), 632 (Figs. 483-488). 

 Rosales, 632. 

 Rose of Jericho, seed-dispersal in, 



328. 

 Rostellum, of Orchis, abortive third 



lobe of stigma, 613 (Fig. 460). 

 Rubia peregrina (Wild Madder), 



straggling habit of, 214. 

 Rubus idaeus, floral construction of, 



267 (Fig. 191). 

 Runner of Strawberry, an elongated 



axillary bud, 246 (Fig. 169). 

 Ruscus (Butcher's Broom), root of, 



190 (Fig. 126) ; phylloclades of, 



344 ( Fi g- 2 59). 

 Rust Fungi, 397, 400, 401, 431, 439 



(Figs. 329-338). 

 Rust of Wheat, 432 (Figs. 329, 338) ; 



immunity of wheats against, 440. 

 Rye, ovary attacked by Claviceps, 



395 (Fig- 293). 425, (Fig. 323) \ 

 analysis of, 660 ; origin of, 661. 

 Rye-grass, 616 (Fig. 464). 



Sage, 647 (Fig. 497). 

 Sageretia, straggling by help of 

 axillary shoots, 214 (Fig. 143, i.), 



345- 

 Salicales, 619. 



Salicornia, succulence of, 211. 



Salix (Willow), 619 (Figs. 466, 467). 



Salsola, a spiny halophyte, 211 ; 

 wind-dissemination of seeds, 327 

 (Fig. 250). 



Salts, in soil water, 97 ; enter plant 

 by root, no. 



Salvia, conducting tissue of style, 293 

 (Fig. 215) ; mechanism of pollina- 

 tion, 302 (Fig. 220) ; flower of, 647 

 (Fig. 497). 



Sand-box Tree (Hura), explosive 

 fruit of, 165, 166 (Fig. 102). 



Sand-sedge, burrowing tip of, 191 ; 

 rhizome of, 191 (Fig. 127). 



Sanio's law of cambial division, 56 



Fig. 35)- 

 Sap, 105. 



Sapindaceae, climbing habit of, 213. 

 Saprogenic bacteria, 451. 

 Saprolegniae, 397, 399. 

 Saprophyte, an organism that derives 



organic supply from the substance 



of some dead organism, or from the 



products of its decay, 220. 

 Saprophytic fungus, in mycorrhiza, 



227 ; initiative of, 230 ; habit of 



fungi, 391 ; life in Euglena, 356. 

 Sap-wood, 64. 

 Sarcina, cubical packet-form of 



Bacteria, 448. 

 Sarcodes, ectotrophic mycorrhiza of, 



228, 229 (Figs. 156, 157). 

 Sarcophycus, 385. 

 Sarracenia, 239, 241. 

 Saxifraga, exudation from, 109 ; 



vegetative propagation of, 247 ; 



flower of, 290 (Fig. 212) ; 630 



(Fig. 480). 

 Saxifragales, 630. 

 Scalariform tracheides, of Fern, 488 



(Figs. 377-379). 

 Scapania, structure of, 473 (Fig. 369). 

 Scarlet-runner, twining stem of, 215. 

 Schizophyta, 448 : {see Bacteria, 



Chap, xxviii.). 

 Schoenus, construction of stem, 51 



(Fig. 28), 185. 

 Scinaia, 546. 

 Scion, a bud or graft inserted on a 



stock, 251. 

 Scirpus, mechanical structure of stem, 



184 (Fig. 118). 

 Sclereids, stone-cells, 176 (Fig. in). 

 Sclerenchyma, hard mechanical tissue 



175, 176 ; of Sunflower, 178 



(Fig. 112) ; of Ferns, 485 (Fig. 



376). 

 Sclerotia, hard storage-masses of 

 fungal tissue, 394 (Fig. 293) ; 424 

 (Fig. 322). 



