314 



BEITISH PLANTS 



hypnoides, 38, 114 ; tridactylites, 

 60 ; umbrosa (London-pride), 37, 

 loo, 213, 221 



Saxifrage: honey, 172 ; meadow- (see 

 Saxifraga granuLata) ; mossy (see 

 8. hypnoides) 



Scabious, 218 ; inn., 181 ; insect- 

 visitors, 170 



Scale-leaves of bulbs, 156 



Scales, bud-, morphology of, 61 



Scarlet runner, 116 



Scar-woods, 269 



Scent of pis., 143 



Schizocarps, f!90 



Selerenchyma, 41, *43 



Scotland : climate, 13 ; alpine veg. of 

 Highlands, 287 ; veg. of mountains, 

 17, 287 



Scramblers, 115 



Scrophularia, insect-visitor, 174 



Serophulariacese : hemi-parasites of, 

 126 ; honey, 173 



Scrub-communities, 17 



Scurvy-grass, 218 



Sea-blite (see Sueda maritima) ; 

 couch - grass association, 280 ; 

 -holly (see Eryngium) ; -purslane, 

 218 ; -rocket (see Cakile mari- 

 tima) ; -samphire (see Crithmum 

 maritimum) 



Seashore : condition of soil-water, 

 88 ; veg. of, 275 



Seaside-annuals, 58, 59 



Seasons, effect on veg. : summer 

 and winter, 10, 31, 57, wet and 

 dry, 10 



Seaweeds : colour of, 53 ; zoning of, 

 278, 283 



Sedges, 46, 62, 115 ; pollination, 167 



Sedum acre, *39 ; RJiodiola, 62 



Seedlings, *25 ; of Acacia, *44 ; 

 protection of, 138 



Seed-plants, 163, 183 



Seeds : in aquatics, 54 ; albuminous, 

 *146, *147 ; defensive equip- 

 ment, 135, 137 ; dispersal : by 

 animals, 196, birds, 196, man, 198, 

 water, 197, wind, 195 ; of epi- 

 phytes, 122 ; exalbuminous, 146, 

 *147 ; explosive, 196 ; formation 

 of, 162, 183 ; hairy, 195 ; oily, 148, 

 196 ; repr. by, 153, 162 ; resistance 

 to cold, 74 ; starchy, 147 ; sterile, 

 149 ; storage of food in, 108, 146 ; 

 winged, 195 ; xerophytic chars, of, 

 59, 74, 137 



Selective absorption, 91 



Self-fertilization, 165 ; -pollination, 

 164, effect on stock, 165, preven- 

 tion of, 176 



Semi-deserts, 9, 12, 36 



Senecio, 105 ; Jacoboea, insect-visi- 

 tors, 170 ; vulgaris, autogamy, 165 



Sepals, 162 



Service-tree. See Pyrus torminalis 



Shade-plants, 72, *73 



Sheep, 20 ; fat-tailed, 145 ; -runs, 

 257 



Shepherd's-needle, 216, 217 ; -purse 

 (see Capsdla) 



Shirley poppy, origin of, 153 



Shoots : colour of young, 73 ; xero- 

 phytic forms of, 42 



Shore, sandy, veg. of, 279 



Shoreweed. See Littordla 



Shrubs, deciduous, 60, 109 



Silene: fr., 187, *188 ; honey, 173 ; 



acaulis, 38, 114 ; nutans, 174 

 i Silica, 82, 98 



j Silicate of alumina, 81 ; lime, 81 ; 

 potash, 81 



Silicula, 188 



Siliqua, 188, *190 



Silver weed, 217 

 | Simethis, 214 

 \ Sinapis, 148 ; arvensis, 216 

 j Sisyrinchium, 214 



Sleep-movements : in fls., 71 ; in 

 leaves, 70, *71 



Sloe. See Prunus spinosa 



Slopes, exposed maritime, veg. of, 

 284 



Slugs, 176 



Smilax, 212 ; tendrils, 119 



Snapdragon: fr., 187, *188 ; honey, 

 171 



Snowdrop, 57, 63, 214, 215 



Soap-making oils, 148 



Sodium chloride, 88 



Soil, 8, 14, 80, 91 ; acids in, 88, 94 ; 

 aeration of, 87 ; animals in, 96 ; 

 -bacteria, 83, 88, 95, 96, 123; 

 biology of, 91 ; capillarity, 86 ; 

 chemical properties, 80, 88 ; and 

 climate, 14, 84 ; dry, 85, 87 ; 

 -factors, 8, 18, 19 ; influence on 

 flora, 21, 84 ; forest-, 18 ; forma- 

 tion of, 80; -fungi, 96, 133; 

 nutriment in, 24, 33, 83, 90, 93 ; 

 percolation of, 87 ; permeability 

 of, 87 ; living populations of, 94 ; 

 physical properties, 80, 85, 90 ; 

 salt-, 33 ; sour, 33, 35, 88, 94 ; and 

 temperature, 87 ; influence on 



