GENERAL INDEX 
See Aliens, Alpines, 
Rare plants. 
and Lusitanian 
Discontinuous, 
floras 
Raspberry: fr., 192; acid in, 143; 
suckers, 155 
Receptacle, *163 
Reduction in structure, 206 
Reed: common (see Phragmites) ; | 
-mace (see T'ypha) 
Reeds, 62; position of leaves in 
relation to light, 46 ; pollination, 
167 
Reed-swamp, 225, 230, 241 ; zoning 
of, 242 
Reed-type of leaf, 43 
Reindeer-moss, 22 
Reproduction : of maritime aquatics, 
275; by seed, 153, 162; vegeta- 
tive, 153, 154 
Resin, 142 
Respiration, 6, 7, 78; of aquatics, 
48, 50, 52 ; of roots, 88 [ 
Rest-harrow, thorns, 44 
Retrogression, 206 
Reversal-point in tendrils, 115 
Rhinanthus, 60; parasitic nature, 
126 
Rhizomes, 62, *110; food-reserves 
in, 150; multiplication by, 161 
Rhododendron, leaf-form, 43 
Rhubarb, 152; calcium oxalate in, 
143 ; culinary, 150 
Ribbon-type of leaf in aquatics, 50, 
51 
Ribes, 215 ; bud-protection, 61 
Rice : food, 147 ; -starch, 146 
River-banks, veg. of, 243 
Rivers, veg. of, 235 
Robinia spines, 140, *141 
Rock-eress (see Arabis) ; -rose, 169 
Rocks : alpine, veg. of, 286 ; classifi- 
cation of, 82 ; denudation of, 80 ; 
limestone-, veg. of, 290 ; lowland-, 
veg. of, 290 ; maritime, 231, veg. 
of, 283 ; sub-alpine, veg. of, 290; 
xerophytic factors of, 35 
Rocky summits, veg. of, 289 
Rolled-leaves, 40, *41, *43 
Root-absorption, 25 ; -climbers, 119; 
-crops, 21, 98; -hairs, *25, 49, 
91; -nodules, *44, *95, 97, 98, 
symbiosis, 133; -stock, 38, 62, 
110 ; -tubers, 111 
Rootless plants, 49, 
Corallorhiza, 124 
Roots: of aquatics, 49; clasping, 
121; fleshy, 150 
131, *132 ; 
313 
Rosa canina, climber, 116; spinos- 
issima, prickles, 116 
Rose, 220 ; bud-protection, 61 ; bud- 
scales, 61; fi., 168; fr., 193; 
moss-, 116; prickles, 116, 141; 
suckers, 155 
Rosemary oil, 42, 151 
Rosette-habit, *37, *62; pls., 60, 
115 
Rotation : of crops, 97 ; -grasses, 20 
Rubber, 142, 152 
Rubus, 220; scrambler, 116. See 
Bramble 
Rum, 151 
Rumex, pollination, 167 
Runners, 155, 161 
Rupture-wort, 218 
Russia, 12, 21, 22 
Rye, 147 
| Sage oil, 42, 143 
Sagittaria, heterophylly, 52 ; winter- 
buds, 54 
Sago-palm, food, 150; yield per 
acre, 149 
Sainfoin, fr., 188, *189 
St. Dabeoe’s-heath, 213, 217 
St. John’s-wort, 217 ; fl., 169 
Salicornia, 41, 58, 59, 88, 278; 
-association, 277, 278 
Salix, 220. See Willow 
Salsola Kali, 59 
Salt : common, 88 ; effect on absorp- 
tion, 33, 88 ; -marsh, veg. of, 231, 
278; -meadow, 279; -swamps 
and marshes, xerophytic factors 
of, 35 
Saltwort. See Salsola Kali 
Salty seaside soils, 35 
Samara, 186, *187, 190 
Sand, 82; absorptive power, 87; 
origin from granite, 81; per- 
meability, 87 ; physical properties, 
81, 90 ; water-capacity, 87 ; water- 
retaining capacity, 87 
| Sand-dunes, 16, 82, 90; formation 
of, 279 ; fixed, veg. of, 230 ; ridges, 
veg. of, 231; veg. of, 58, 59, 107, 
225 
Sandstone-hills, veg. of, 257 
Sandy loam, 82 ; soils, 35 
Saprophytes, 6, *123, 206; partial, 
125 ; total, 124 ; of woods, 266 
Sarsaparilla. See Smidax 
Savannah, 17. See Park-land 
Saxifraga Geum, 213, 221; granu- 
lata, 62, bulbils, 160 ; hirsuta, 213 ; 
