512 



INDEX OF PLANT NAMES 



Rhizophora, mucronata, 52, 162,287 



Rhododendron, cuticular transpira- 

 tion, 176 ; leaves, 

 189 ; pollen, 344, 

 347 ; multiplica- : 

 tion, 460 



ferrugineum, 189 i 



hybridum, 87, 91 j 



Rhubarb, 308 



Rhus glabra, 32 



toxicodendron, 309 



Rhynchosia, 305 



Rice, 57, 384 



Ricinus, 344 



communis, gaseous ex- 

 change, 88 ; assimila- 

 tion, 134 ; germination, 



435, 436 



Rock-rose, calcicole, 65, 66 ; habi- 

 tat, 190 ; pollination, 356 ; 

 fall of corolla, 403 



Roridula, 270 



Rosa arkansana, 29, 32 



Rose, graft, 225 ; pollination, 356 ; 

 fruit, 402 ; fall of corolla, 

 403 ; forcing, 452 ; multipli- 

 cation, 460 



Rosemary, 180, 184 



Robinia, 124, 187 



pseudacacia, 206, 346 



Rubber, Para, 309, 419 



Rubus odoratus, 394 



Rue, 184, 185 



, meadow, 376 



Rumex, pollen protection, 351 ; pol- 

 lination, 383 ; pollen 

 tube, 392 



Acetosa, 309, 337, 340 



alpinus, 89 



crispus, 420, 426, 430 



Ruscus aculeatus, 194, 195 



Rush, 294 



, flowering, 294 



Ruta graveolens, 383 



Rye, roots, 40 ; pollen, 346 ; self- 

 sterility, 392 ; seed vitality, 

 419 ; germination, 433 



Sage, pollen, 348 ; nectar, 357 ; 



and bee, 394 ; fall of 



corolla, 403 



, meadow, 380 



Sagittaria, 36, 332, 424 



sagittifolia, 340, 446, 



447 

 Salicornia, 51, 196 

 herbacea, 189, 196 



Salix amygdaloides, 332 



cinerea, 191 



pentandra, 191 



Salsola Kali, 196 

 Saltwort, 189 

 Salvia, 383 



pratensis, 374, 380, 385 



aurea, 374 



cleistogama, 397 



Sambucus nigra, 135 

 Sanguisorba officinalis, 370 

 Santalum, 221 



album, 221 



Sarracenia, 274, 275, 276 



— — — — Drummondi, 275 



flava, 275 



psittacina, 274 



rubra, 274 



variolans, 274 



Satureia hortensis, 334, 337 



Saxifraga, 38 



Saxifrage, golden, 375 



Scabiosa, 182 



succisa, 184 



Scarlet runner, pulvinus, 120 ; pho- 

 tropism, 122 ; sleep move- 

 ment, 204 ; twining plant, 

 296, 297 ; fall of flower, 403 ; 

 germination, 436 



Scilla, 26 



Scirpus, 424 



Scleroderma vulgare, 246 



Sea lettuce, 80 



Secale cereale, 392 



Sedge, stomata, 185 ; leaf form, 

 189 ; habitat, 190 ; silicifica- 

 tion, 308 ; pollination, 382, 



394 

 Sedum, 162 

 Selaginella, 316 

 Sempervivum, 127, 332 



alpinum, 211 



arenarium, 211 



Funkii, 458 



tectorum, 90 



Senecio, 415 



doria, 214, 215 



grandiflorus, 114 



sylvaticus, 42 



Sequoia, 208, 460 



Shepherdia, 263 



Shepherd's purse, 397, 420, 448 



Sieversia ciliata, 31 



Silene inflata, 331, 337, 370 



nutans, 370 



viscosa, 336 



Silk- weed, 415 

 Silphium laciniatum, 124 



