436 



INDEX 



Self-heal, 254, 380. 

 Semi-parasites, 256, 358-9. 

 Senecio, 262, 378, 380, 385. 

 Sensitive-plant, 152, 245. 

 Sepals, 15. 



Separation-layer, 72-3, (Figs. 41, 

 42). 



inleaves, 73, 108, (Fig. 65), 122, 

 310. 



in roots, 139, (Fig. 87). 



in shoots, 122. 

 Sesleria, Blue, 370. 

 Shade, effect of, on growth, 



348. 

 Shade plants, 348. 

 Shade position, 147-8, (Fig. 95). 

 Shepherd's Purse, 124, 215, (Fig. 



ISO). 2 38, 37 8 - 

 Sherardia, 378. 

 Shingle beaches, 387-90, (Fig. 



249). 

 Shingle-binding plants, 388-9. 

 Shoots : 



adventitious, 60-2, (Fig. 27), 



122. 

 ascent and descent in the soil, 



128, (Fig. 82), 134, 137, 



139- 



deciduous, 122. 



dwarf, 117, 118, 121, (Fig. 74). 



effect of stimuli on, 74-7. 



elongated, 121. 



environment of, 64, 65, 123-4. 



growing region, 47, (Fig. 22). 



growth of, 25-30. 



modified, 123-42. 



rate of growth of, 77-8. 



scars, 113, (Fig. 68). 



sensitiveness of, 74-7. 



shedding of, 122. 



stool-, 1 21-2. 



underground, 125-40. 



work of, 74-103. 

 Side-saddle Flowers, 365. 

 Sieve-tubes, 69, (Fig. 32). 

 Silene, 239, 241, 242, 361, 378, 



383, 388. 

 Silverweed, 141, 242, 7,77. 379- 

 Sisymbrium, 378, 380. 

 Skeleton of leaf, 65, (Fig. 30J. 



of stem, 70, (Fig. 33). 

 Skullcap, Greater, 254. 

 Sleep-movements, 149-52. 



Smilax, 147, (Fig. 96), 266. 

 Snapdragon, 125, (Fig. 159), 256, 



(Fig. 174). 

 Snowberry, 258. 

 Snowdrop, 136. 

 Snowflake, 267. 

 Social plants, 142. 

 Soft-grass, 125, 343, 348, 350. 

 Soils, 320-36. 



aeration of, 331, 335, 372-3, 



375- 



calcareous, 331. 



capillarity of, 332-3. 



composition of, 321. 



effect of hoeing, 334-5. 



humus-content, 322. 



liming, 332. 



organic matter in, 322. 



organisms in, 54-5, 323-6. 



permeability of, 330. 



physiologically dry, 336. 



properties of, 328-31. 



salts in, 382, 385. 



sedentary, 320, (Fig. 212). 



transported, 321, (Fig. 213). 



water-content, 322. 



water-supply, 335-6. 

 Solanaceae, 254-5. 

 Solarium, 254-5. 

 Solomon's Seal, 128, 266, 349. 

 Sonchus, 378, 379. 

 Sorrel or Green-sauce, 380. 



sheep's, 369, 379. 

 Spathe, 196, (Fig. 134), 198, (Fig. 



136). 

 Spearwort, Lesser, 343, 370, 376. 

 Species, 11, 231. 

 Speedwell, Corn, 379. 



Germander, 183-5, (Fig- I2 6), 

 193, 256, 263, 369, 380. 



Ivy-leaved, 378. 



Marsh, 256. 



Water, 256. 

 Spergula, 239. 

 Spergularia, 239, 378, 383. 

 Spermaphyta, 231, 233. 

 Sphagnum bog, 396-7. 

 Spindle Tree (Euonymus), 225, 



349. 353- 

 Spines, branch, 339. 



leaf, 339. 



Spiraea, 243. 



Spiranthes, 269. 



