308 



BRITISH PLANTS 



Indian corn. See Zea Mais 

 Indigenous plants, 215 

 Inflorescences, 178 

 Insectivorous plants, 129, 131 

 Insect-pollination, 167 

 Insects, adaptation to fls., 168, 178 

 Integument, *163 

 Interdependence of pi. and animal 



life, 79 



Intoxicating drinks, 151 

 Inula salicina, 214 

 Ireland : alpine veg. of west of, 286, 



288 ; flora of, 213, 214 ; pis. absent 



from, 214 

 Iris : aril (foetid iris), 196 ; fr., 187, 



*189; honey, 172; pollination, 



177 ; rhizome, 154 ; seed, 146 ; 



mesophytic chars, of, 31 ; xero- 



phytic chars, of, 31, 46 

 Irrigation, 18 



Islands : flora of, 207 ; origin of, 207 

 Isoetes, 50 

 Ivy, 39 ; climbing pi., 119 ; honey, 



172 ; leaf-mosaic, 68, *69. See 



Hedera Helix 

 Ivy-leaved toadflax, 216 



Jacob's-ladder, 217 



Jasione montana, 60 ; insect- visitors, 



170 



Juncoid type of leaf, 43 

 Juncus-bog, 231, 246 

 Juncus bufonius, 59 

 Juniper, 36 ; leaf, 42 ; seeds, 196 



Key, 186, 190 



Killarney fern, 29, 214 



Knight, Robert, on self-fertilization, 



165 

 Kohlrabi, 111, * 112 



Labiatae, fr., 191 ; honey, 173 



Laburnum seeds, 138 



Lactuca, latex, 142. See Lettuce 



Lacustrine deposits, 80 



Lady's-fingers, 217 ; -smock, 217 ; 

 -tresses, 217 



Lakes : veg. of highland-, 238 ; veg. 

 of lowland-, 236 



Land-plants, 28 ; growth-forms of, 

 114 



Larch, 22 ; -wood, 274 



Larkspur: fr., 188, *189; pollina- 

 tion, 174 



Latex, 142 



Lathrcea : parasitic habit of, 126, 

 *127 ; water-glands of, 127 



Lathyrus tendrils, 118, *120 



Latitude, 10 



Laudanum, 152 



Laurel, 23, 39, 212 ; extra-floral 

 nectaries, 173 



Lavender, essential oil, 143, 151 



Law of population, 202 



Leaf : -fall, 60, influenced by pruning., 

 109, and coppicing, 109 ; erect-, 

 46 ; -modifications, 38 ; -mosaic, 

 45, 68 ; position in xerophytes, 

 46 ; -scars, 62 ; shade-, 72, *72 ; 

 -spines, 140, *141 ; sun-, *72 ; 

 -types in aquatics, 50, in xero- 

 phytes, 42 



Leaves : colour of young, 73 ; cur- 

 rent-, 235 ; edible, 150 ; fixed 

 light-position of, 69 ; floating-, 49, 

 51 ; heliotropism of, 68 ; sleep- 

 movements in, 70, *71 



Legume, 188, * 189 



Leguminosae : fr., 188 ; honey, 173 



Leguminous crops, 98 ; pis. : protein 

 of, 147, root-nodules of, 95 



Lemna, 55, 56 ; roots, 49 



Lemon, 143, 151 



Lenticels, 140 



Lentils, 147 



Lepidium ruderale, 60 



Lepidoptera, 170, 174 



Lepidopterous flowers, 170 



Lettuce, 150. See Lactuca 



Lianes, 121, 267 



Lichen-flora, 22 



Lichens : epiphytic, 121 ; habitat of, 

 133 ; symbiosis of, 132 



Light : in relation to aquatics, 52 ; 

 composition of, 66 ; source of 

 energy, 4, 65 ; effect on growth, 

 36, 71, 72, 115, 120; effect of 

 intens'ity on veg. of woods, 266, 

 269, 270, 272, 274; -position of 

 leaves, fixed, 69, in xerophytts, 

 46 ; effect on transpiration, 34, 45 



Lignified tissue, 41 



Lilac: bud-scales, 61; infl., 179; 

 suckers, 155 



Lily, 63, 72 ; repr., 15 ; tiger-, repr. 

 by bulbils, 160 ; of the Valley, 214 



Lime-tree : bud-scales, 61 ; fr., 194 ; 

 honey-dew, 134 ; insects on leaves 

 of, 144 ; leaf, relation between 

 form and function, 103 



Lime : bicarbonate, 89 ; carbonate, 

 89 ; silicate, 81 



Limestone, 82 ; disintegration of, 

 81 ; -hills, 81 ; -pasture, 230 ; 



