314 
hypnoides, 38, 114; tridactylites, 
60 ; wmbrosa (London-pride), 37, 
155, 213, 221 
Saxifrage: honey, 172 ; meadow- (see 
Saxifraga granulata) ; mossy (see 
S. hypnoides) 
Seabious, 218; infl., 181; insect- 
visitors, 170 
Seale-leaves of bulbs, 156 
Seales, bud-, morphology of, 61 
Searlet runner, 116 
Sear-woods, 269 
Seent of pls., 143 
Schizocarps, +190 
Selerenchyma, 41, *43 
Scotland : climate, 13 ; alpine veg. of 
Highlands, 287 ; veg. of mountains, 
17, 287 
Seramblers, 115 
Scrophularia, insect-visitor, 174 
Scrophulariacezx : hemi-parasites of, 
126 ; honey, 173 
Serub-communities, 17 
Scurvy-grass, 218 
Sea-blite (see Sweda 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 ; Rhodiola, 62 
Seedlings, *25; of Acacia, 
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 
¥*44; 
BRITISH 
PLANTS 
Self-fertilization, 165; -pollination, 
164, effect on stock, 165, preven- 
tion of, 176 
Semi-deserts, 9, 12, 36 
Senecio, 105; Jacobewa, 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 Capsela) 
Shirley poppy, origin of, 153 
Shoots: colour of young, 73; xero- 
phytic forms of, 42 
Shore, sandy, veg. of, 279 
Shoreweed. See Littorella 
Shrubs, deciduous, 60, 109 
Silene: fr., 187, *188 ; honey, 173 ; 
acaulis, 38, 114; nutans, 174 
Silica, 82, 98 
Silicate of alumina, 81; lime, 81; 
potash, 81 
Silicula, 188 
Siliqua, 188, *190 
Silverweed, 217 
Simethis, 214 
Sinapis, 148 ; arvensis, 216 
Sisyrinchium, 214 
Sleep-movements : 
leaves, 70, *71 
Sloe. See Prunus spinosa 
Slopes, exposed maritime, veg. of, 
284 
in fis:, Vi3aom 
Slugs, 176 
Smilax, 212 ; tendrils, 119 
Snapdragon: fr., 187, *188 ; honey, 
ald 
Snowdrop, 57, 63, 214, 215 
Soap-making oils, 148 
Sodium chloride, 88 
Soil, 8, 14, 80, 91 ; acid§ 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 
