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 



luberosus), 44. 

 Johansen, 378. 

 Joinery, timber used in, 129. 

 Jointed Rush (Juncus articulatiis) , 



leaf-structure of, 165 (fig.), 



1 66. 



Juglans nigra, 129. 

 Juncacese, 408. 

 Juncus articulatus, leaf-structure 



of, 165 (fig.), 1 66. 

 Jungermanniales, 407. 

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



353- 



Jute (Corchorus), 34, 265. 

 Juvenile forms, of Angiosperms, 



395 (fig.), 396 ; of Conifers, 



337. 338 (fig.). 



Kapok (Eriodendron anfractuosum), 



103. 



Karyokinesis, 22. 

 Knots (in timber), 129. 

 Knotweed (Polygonum), ovules of, 



358 (ng.). 

 Kola (Cola acuminata), 61. 



28 



Labiatae, 21, 61, 80, 105. 

 Laburnum (Cytisus laburnum), 137, 



389. 



Lacquer-tree (Rhusvermicifera), 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, 168, 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 lalnatomy of, 91-116 (figs.) ; 

 ^connection with stem, 114 

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

 development of, 90 ; effect of 

 environment on, 168-70 (fig.), 

 177 (fig.) ; evergreen, 112, 

 335 i 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 8 -) ; shedding of, 

 141, 142 (fig.) ; succulent, 

 1 66 ; support of, 115; varie- 

 gated, in. 



