622 



GENERAL INDEX 



Ranunculaceae, 535, 544 

 Ranunculus ; on tropical mountains, 

 269, 272 ; Hawaiian species, 272-3 ; 

 dispersal by birds, 277, 511 ; buoy- 

 ancy of fruits, 535 

 Ranunculus aquatilis, 37, 535 

 Ranunculus repens, ^y, 86, 535, 545 

 Ranunculus sceleratus, 37, 535, 544, 



545 

 Ranunculus ; other British species, 



535 

 Raphanus, 33, 478, 536, 540, 596 

 Rarotonga ; its flora, 48, 177, 291, 



295> 309, 317, 3 2 °, 323, 336, 374, 

 419, 425, 551, 578 ; altitude, 208; 



rainfall, 216 ; absence of mangroves, 

 50 ; ferns, 221-2 ; endemic species 

 of flowering plants, 232 ; the age of 

 arborescent Composite and Lobeli- 

 aceas represented by Fitchia, 237-8, 

 and by Sclerotheca, 250, 252, 256-7 ; 

 scanty representation of Tahitian 

 mountain plants, 293 ; a connection 

 with the Kermadec islands, 295 



Rauwolfia, 362 



Reinecke, Dr., on the Samoan flora, 

 19, 232, 266, 291, 317, 387, 577, 579 ; 

 on Elatostema, 405 



Remya, 236-7, 243-4 



Rendle, Mr., on Naias, 368 



Reseda luteola, 536 



" Revue Scientifique," 506 



Rewa River (Fiji) ; seed-drift, 76, 78, 

 435 ; temperature, 78, 564 



Reynoldsia, 309, 310, 371 



Rhaphidophora, 404, 532 



Rhinanthus crista galli, 537, 545 



Rhizophora ; general discussion, 440, 

 520-1 ; dispersal by currents, 48, yy, 

 94, 458 ; the " Selala " or seedless 

 form in Fiji, 443 ; its representative 

 in Ecuador, 449, 487, 521 ; the 

 genus in Ecuador, 483-7 ; in 

 Panama, 498-9 ; absence from 

 Hawaii, 54-5, and Tahiti, 47 ; ger- 

 mination and growth of seedling, 

 451, 468, 575 ; river-drift, 435, 460, 

 499 ; beach-drift, 437-S, 460, 499 ; 

 polyembryony, 449 ; distribution, 

 5.4-5, 69, 520 



Rhizophora mangle ; in Fiji, 43, 441, 

 520 ; in Ecuador, 484-7 ; in Panama, 

 498-9 ; discussed in detail in 

 Chapter XXX 



Rhizophora mucronata, 43, 68 ; dis- 

 cussed in detail in Chapter XXX 



R hus, 353, 354 



Rhynchospora, 272, 283-5 



Richella, 265 



Ricinus communis, 142, 533, 558 

 Ridley, Mr. H. N., on the plants of 



Fernando Noronha and of the Malay 



peninsula, 8, 144, 162, 319, 340, 386, 



603 

 River seed-drift ; Thames, 37, 85, 91, 



430 ; Rewa (Fiji), 76, 91, 435 r 6 ; 



Guayaquil or Guayas River 



(Ecuador), yy, 91, 435, 488-9 ; 



Panama isthmus, 499 ; germination 



in river-drift, 76-8, 84, 85-6, 435, 



488-9 

 River temperature, 78, 564 

 Robinson, Mr. E. Kay, on the dispersal 



of Aster tripolium, 605 

 Rodriguez Island, 157, 351 ; see 



Mascarene Islands 

 Rcemeria hybrida, 535 

 Rollandia, 252, 255, 258 

 Rosa arvensis, 536 

 Roxburgh, W., on the seed-structure of 



Barringtonia, 575 

 Rubiaceas ; appearance of the order 



in the Pacific islands, 261, 262 

 Rubus, in Hawaii, 269, 272-4, 285, 



533, 604 

 Rumex ; in Hawaii, 366 ; modes of 



dispersal, 367 ; fruits in Thames 



drift, 37, 86, 430 ; buoyancy of the 



fruits of British species, 537, 545 

 Ruppia maritima, 371, 372, 374, 398, 



482, 537, 555 

 Russell, Prof., 493 

 Ruwenzori, Mount, 241, 251 



Sachs, Prof., 100 



Sadleria, 593 



Sage-brush, 279 



Sagina procumbens, 536 



Sagittaria sagittifolia, 38, 537 



Sagus vitiensis, 413 



St. Helena, 8, 258 



Salicornia ; mode of dispersal, 482.,. 



489, 541, 545 

 Salicornia herbacea, 34, 35, 537, 541, 



5.45 

 Salicornia peruviana in Ecuador, yy, 



484-6, 489 

 Salicornia ; other species in Chile and 



Peru, 478, 482 

 Saline deposits of North Chile, 



suggested origin, 485 

 Salsola kali, 10, 34-6, 429, 431, 477, 



479, 537, 541 

 Salvia verbenaca, 28, 537, 567-8 

 Sambucus nigra, 536 

 Salvinia, 488 

 Samoa ; altitude, 208-9 ! f ew peculiar 



genera, 266 ; proportion of peculiar 



