288 



Practical Plant Biology. 



Ranunculus repens, stems of, 215. 



structure of stems of, 216. 



stigma of, 233, 234, 235, 237. 



stomata of, 216, 222. 



style of, 233, 234, 237. 



synergidas of, 234. 



tapetum of, 231. 



thalamus or axis of, 230. 



water, rise of, in, 224 et seqq. 



WOOd Of, 217, 220, 221. 



Recessive character, 262. 



double, 266. 



Reconstruction, microscopic, 68, 74, 89. 

 Red sea-weeds, a source of bacteria, 52. 



Polysiphonia, example of, 113. 



Reduction-mitosis, 255 el segq. 



in Fucus, 257. 



Polysiphonia, 257. 



Seed-Plants, 257. 



Spirogyra, 258. 



Reproduction, asexual, 39. See 



Asexual reproduction. 

 sexual, 39, 72. See Sexual reproduc- 



hunger stimulus and, 40. [tion. 



of Chlamydomonas, 39. 

 Spirogyra., 72. 



origin of, 40. 



Resin ducts, 184, 196, iq8. 

 Respiration aerobic, 49, 50, 116, 157. 

 - anaerobic, 31, 32, 33. 

 of yeast, 31. 



bacteria, 63. 

 Mucor, 96. 



Penicilliunj, 103. 



defined, 32. 



dependent on enzymes, 33. 



intermediate stages of, unknown, 51. 

 reverse of photosynthesis, 49. 

 Reversible actions, 29. 

 Rhizophore of Selaginella, 171. 

 Rhododendron petal, 15, 17, 19 (Fig. 4). 

 Rigidity 'of cell, 19. 

 leaf-stalk of Aspidium, 153, 158. 



pinnae of Aspidium, 159. 



stem of Pinus, 187. 



Ranunculus, 219. 



tissues, 19. 

 Root-apex, 242, 243. 

 Root-cap, 153, 173, 190, 223, 242. 

 Root-hairs, 190, 241. 

 Root-pressure, 228. 

 Roundness, 261 (Fig. 92). 



Saccharomyces cereviseee. Lectures III. 



and IV., 23-34 (Fig- 5)- 

 bud of, 25. 



cell-wall of, 25. 



holozoic, 102. 



protoplasm of, 23. 

 size of, 23. 



Saccharomyces cerevisece, source of 

 nitrogen for, 102. 



spore of, 25. 

 Saprophytes, 65. 

 Scalariform tracheids, 149. 

 Scalesia, 275. 



Scilla nutans. Lecture XXVII., 239- 



249 (Figs. 86, 87, 88, 89). 

 air-spaces of, 241. 



apex of, 242. 



bulb of, 240, 241, 243. 



carpels of, 246, 249 (Fig. 89). 



collenchyma of, 243. 



conducting tract of, 241, 243. 



cortex of root of, 241, 243. 



cotyledon of, 248, 249. 

 cuticle of leaves of, 245. 



- dissemination of seeds of, 248. 

 embryo of, 248. 



embryo-sac of, 246 (Fig. 89). 



endodermis of, 242. 



endosperm of, 248. 



epidermis of, 243, 245. 



fibrous layer of, 246. 



~ flowers of, 240, 245, 248, 249. 



fusion-nucleus of, 248. 



gametophyte of, female, 247. 

 male, 249. 



integument of, 248. 

 leaves of, 240, 245. 



life-history of, 248. 



loculus or, 246 (Fig. 89). 



megagametophyte of, 247. 



megaspores of, 249. 



microgametophyte of, 249. 



microspores of, 249. 



nucellus of, 246 (Fig. 89). 



ovary of, 246 (Fig. 89). 



ovules of, 246, 249 (Fig. 89). 



ovum of, 247, 249. 



passage-cells of, 242. 



perianth of, 246. 



pericycle of, 241. 



piliferous layer of, 241. 



pollen-grains of, 246, 249. 



pollen-sac of, 246, 249. 



pollen-tube of, 249. 



pollination of, 247. 



protoxylem of, 241. 



root of, 240, 241. 

 root -cap of, 242. 



root-hairs of, 241. 



seed-coat of, 248. 

 seeds of, 248. 



sperm-cells of, 247, 249. 

 . sporogenous cells of, 246. 

 stamens of, 246. 



- starch in, 243. 



stem of, 243. 

 stigmas of, 246, 249. 



