INDEX 



433 



Roraima, 109 



Resales, 310, 319 



Roslyn Pits, Ely, 147, 215, 241 



Rotala, alien accompanying rice, 303 ; 



cleistogamy, 234 

 Rotala indica, 303 

 Rotifers, 94, 142 

 Rubiaceae, 151, 313 

 Rubus fruticosus, 200 

 Ruppia, in brackish water, 134; macro- 



podous embryo, 319 (Fig. 166); 



pollination, 70; reduction of primary 



root, 244 

 Ruppia brachypus, 319 (Fig. 166) 



Sacred Lotus. See Nelumbo Nelumbo 



Sagittaria, band or ribbon leaves, 9,11 

 (Fig. 3), 12, 13 (Fig. 4), 140, 141 (Fig. 

 90); diaphragms, 19 (Fig. 8), 167; 

 effect of freezing on fruit, 243 ; floating 

 of fruit, 297; flowers, 10 (Fig. i); 

 fruits, 10 (Fig. 2); heterophylly, 9, 

 II (Fig. 3), 12, 13 (Fig. 4), 14 (Fig. 5), 

 16 (Fig. 6), 22, 23 ; in biological classifi- 

 cation, 5; leaf anatomy, 344, 345 (Fig 

 171); mericarps and seeds, 17, 18; 

 phyllodic interpretation of leaf, 161, 

 162, 339, 340, 344, 345 (Fig. 171); 

 squamulae intravaginales, 13, 15; 

 stolons, 15, 16 (Fig. 6), 18 (Fig. 7); 

 tubers, 11 (Fig. 3), 13 (Fig. 4), 15, 16 

 (Fig. 6), 17, 18 (Fig. 7). 217, 223, 224 



Sagittaria montevidensis, 344, 345 (Fig. 

 171) 



Sagittaria nutans, 12, 156 



Sagittaria sagittifolia, 5, 9, 10 (Figs. 1, 

 2), 11 (Fig. 3), 12, 13 (Fig. 4), 14 

 (Fig. 5), 15, 16 (Fig. 6), 17, 18 (Fig. 

 7), 19 (Fig. 8), 23, 32, 34, 61, 141 

 (Fig. 90), 156, 157, 217, 223, 224, 297. 

 344. 345 (Fig. 171) 



Sagittaria sagittifolia f. vallisneriifolia, 

 II, 12 



Sagittaria teres, 7, 22 



Sagittaria variabilis, 17 



St John's River, Florida, 213 



Salix, development of aerenchyma, 188; 

 effect of submergence, 200 



Salix viminalis, 188 



Salt, toleration of, by certain hydro- 

 phytes, 133, 134 



Salvinia, 311, 337 



Santalaceae, 312 



Santarem, 291 



Sarracenia, 93 



Sarraceniales, 310, 319 



Saxifragaceae, 310 



Scania, 303 



Scirpus, affinities, 317; heterophylly, 

 154; in Jura lakes, 287, 288 



Scirpus fluitans, ^ij 



Scirpus lacustris, 154, 288, 317 



Scotland, 290 



Screw Pine, 317 



Scrophulariaceae, 151, 313, 318 



Scutellaria, 188 



Sedges in Lake Ellis 286 



Seed dispersal, 17, 18, 35, 71, 72 (Fig. 



46), 297-303 

 Seedlings, 243-249; oiAlisma, 151, 153 



(Fig. loi); Castalia, 28 (Fig. 13), 29; 



Ceratophyllum, 85, 86 (Fig. 55); 



Dicraea, 114, 115 (Fig. 78); Elatine, 



245 (Fig. i5S);Hippuris, 245 ; Lawia, 



iiy iLemna, 80, 81 (Fig. 52); Limna^t- 



themum, 248; Nymphaea, 35 (Fig. 18), 



36; Rhyncolacis, 121; Trapa, 245- 



247 (Fig. 160); Utricularia, 100 (Figs. 



67, 68); Victoria, 32, 33 (Fig. 16), 34; 



Zannichellia, 245, 246 (Fig. 159) 

 Seeds, 239-249; of Aldrovandia, no; 



Alisma, 242, 297; Callitriche, 297; 



Castalia, 243; Hippuris, 242, 297; 



Hottonia, 297; Hydrocharis, 241; 



Lemnaceae, 80, 297; Limnanthemuni, 



240 (Fig. 156), 241, 243, 297; Litto- 



rella, 242 ; Lobelia, 297 ; Mayaca, 243 ; 



Myriophyllum, 242; Nymphaea, 243; 



Potamogeton, 297; Ranunculus, 297; 



Sagittaria, 17. 18, 297; Stratiotes, 



241; Utricularia, 99, 100 

 Sensitive Plant, Floating. See Neptunia 



oleracea 

 Sesbania, 191 

 "Shade leaf" characters of submerged 



leaf, 45 (Fig. 27), 164, 165, 171, 279 

 Siberia, 302 



"Sifting" in evolution, 162, 203 

 Siuni latifolium, heterophylly, 147, 149 



(Fig. 97), 150 (Fig. 98); in biological 



classification, 5 

 Sleep movements, 281 

 Snails, as food of Utricularia, 93 

 Snails, water, absence in peaty water, 



287; as pollinators of Sagittaria, 9; 



unable to eat turions of Utricularia, 



lOI 



Sneezewort. See Achillea ptartnica 

 Solanum Dulcamara, 198 

 Soldier, Water. See Stratiotes aloides 

 Sparganium, fruits eaten by wild ducks, 

 301; resemblance to Pandanaceae, 



317 



Sparganium natans, 317 



Spathicarpa, 315 



Spathiflorae, 314 



Spearwort, Greater. See Ranunculus 

 Lingua 



Spearwort, Lesser. See Ranunculus 

 Flammula 



Specific characters, constancy of ana- 

 tomical, 131, 331; lack of utility of, 



131. 330, 331 

 Specific vital energy, 212 

 Speedwell, Water. See Veronica Ana- 



gallis 



