INDEX 



433 



and cuticle, 92 ; and dextrin, 

 46 ; and glycogen, 231 ; and 

 inulin, 44 ; and lignified walls, 

 32 ; and proteins, 3, 50 ; and 

 starch, 41 ; and tannins, 60. 



Ions, 14, 15. 



Ipecacuanha (Psychotria ipecacu- 

 anha), 61. 



Iris, 44 ; leaf-structure of, 96, 97 

 (fig.), 99, 115, 116, 160 ; root- 

 structure of, 70 (fig.). 



Iris germanica, 10, 97 (fig.). 



Irish Yew (Taxus baccata, var. fasti- 

 giata], 380. 



Irisin, 44. 



Iron-Bacteria, 268. 



Irregular flowers, 355, 373. 



Irritability, of guard-cells, 100 ; of 

 sexual cells, 222, 224, 281, 302 ; 

 of zoospores, 214, 232. 



Isaiis tinctoria, 48. 



Island floras, 393. 



Isobilateral leaves, structure of, 97, 

 116. 



Isoetes lacustris, 314, 315 (fig.), 407. 



Isogamy, in Algae, 185 (fig.), 186, 

 213 (fig.), 214, 220, 227 ; in 

 Fungi, 237 (fig.), 238. 



Ivy (Hedera helix), 10 ; secretory 

 canals of, 152 (fig.). 



Jarrah (Eucalyptus marginata), 130. 

 Jerusalem Artichoke (Helianthus 



tuberosus), 44. 

 Johansen, 378. 

 Joinery, timber used in, 129. 

 Jointed Rush (Juncus articulatus) , 



leaf-structure of, 165 (fig.), 



1 66. 



Juglans nigra, 129. 

 Juncaceae, 408. 

 Juncus articulatus, leaf-structure 



of, 165 (fig.), 1 66. 

 Jungermanniales, 407. 

 Juniper (Junipsrus), 336, 352 (fig.), 



353- 



Jute (Corchorus), 34, 265. 

 Juvenile forms, of Angiosperms, 



395 ( n g-). 39 6 J of Conifers, 



337, 338 (fig-)- 



Kapok (Eriodendron anfracluosum], 



103. 



Karyokinesis, 22. 

 Knots (in timber), 129. 

 Knotweed (Polygonum), ovules of, 



358 (fig.)- 

 Kola (Cola acuminata), 61. 



28 



Labiatae, 21, 61, 80, 105. 



Laburnum (Cytisus laburnum), 137, 

 389. 



Lacquer- tree (Rhusvermiciferd), 155. 



Lactic acid Bacteria, 265. 



Lactose, 265. 



Ladder-like perforations (of vessels), 

 35 (fig-)- 



Lady Fern (Athyrium filix-fcemina], 

 289, 291, 305. 



Lady's Mantle (Alchemilla), 372. 



Lagenostoma lomaxi, 332 (fig.). 



Laminaria, habitat of, 199, 203 ; 

 reproduction of, 218 ; thallus 

 of, 199 (fig.), 200, 202. 



Laminaria digitata, 199 (fig.) ; L. 

 saccharina, 199. 



Lamium, 4, 105, 364 ; collenchyma 

 of, 31 (fig.), 34 (fig.). 



Lamium galeobdolon, sun- and shade- 

 leaves of, 1 68, 169 (fig.). 



Land-forms of aquatics, 93, 175-7 

 (figs.). 



Landolphia, 157. 



Larch (Larix europ&a), 129, 334 ; 

 cones of, 336 (fig.), 345, 346, 

 347 ; habit of, 335, 336 (fig.) ; 

 leaf of, 343 ; seedlings of, 337, 

 338 (fig-). 



Lastrcea filix-mas. See Nephrodium 

 filix-mas. 



Latent characters (of hybrids), 

 382, 383, 384, 385. 



Lateral branches, of roots, 65, 71 

 (fig.) ; of stems, 72, 129. 



Lateral conjugation, 227 (fig.). 



Latex, 153-7. 



Lathrcea, hydathodes of, 145 (fig.). 



Laticiferous cells, 153, 154 (fig.); 

 -vessels, 154, 155 (fig.), 157- 



Laurel (Laurus nobilis], 151. 



Lavender (Lavendula), 61, 62, 106 ; 

 oil of, 62. 



Leaf, anatomy of, 91-116 (figs.) ; 

 connection with stem, 114 

 (fig.), 294 (fig.), 295, 344 ; 

 development of, 90 ; effect of 

 environment on, 168-70 (fig.), 

 J 77 (fig-)l evergreen, 112, 

 335 ; growing point of , 18 (fig.); 

 movements of, 115, 116; posi- 

 tion in relation to light of, 

 112; reduced, in ; reduction 

 of, 158, 165, 178 ; rolled, 

 163-4 (fig 3 -) ; shedding of, 

 141, 142 (fig.) ; succulent, 

 1 66; support of, 115; varie- 

 gated, in. 



