136 



PLANT GEOGRAPHY 



Pringlea, 43, 44, 60, 119 

 Proteaceae, 84 

 Psammophilous plants, 53 

 Psammophytes, 125 

 Pseudobornia, 15, 1 6 

 Psychrophytes, 126 

 Pteridophyta, 14-19 

 Pteridospermese, 16 



Rainfall, 36 



Rain- forest, 102, 105, 107, 109- 



in, 116, 123, 128 

 Reed- swamp formation, 123, 124 

 Regions of vegetation, 5, 95-121 

 Representation, 2, 80, 105 

 Rhododendron, 71, 89, 109 

 Rubber- tree, Para, in 

 Ruderal plants, 60 



Saharan Region, 103 

 St. Helena, 113 

 Salt, 50 



Sand-dunes, 42, 59, I2 5 

 Santalum, no 

 Saprophytes, 52, 56 

 Savannah, 37, 105, 107, 108 

 Saxicolous plants, 59 

 Scandinavian flora, 97 

 Schimper, 88 

 Sciophytes, 36, 124 

 Sclerophyllous plants, 39, 99 



125, 130, I3 1 

 Screes, 59, 125 

 Scrub-lands, 37, 120, 130 

 Sea as barrier, 76 

 Sea, Influence of, 31 

 Seasonal succession, 57 

 Sedum, 64, 125 

 Seed-dispersal, 3, 43 

 Seeds, Power of resistance of, 3: 

 Selva, 36 

 Seychelles, 109 

 Shade-plants, 30, 124 

 Shore flora, 58, 59 

 Silicicolous plants, 53 

 Snow-line, 71 

 Social plants, 56 

 Soils, 32, 38, 45-55,76 

 Sphagnum, 55, 76 

 Steppes, 37, 100 

 Storeys, 130 

 Stove-plants, 2, 39 

 Struggle for existence, 57 

 Succession, 54, 5 7- 60 



Succulent plants, 40 

 Sun plants, 29 

 Symbionts, 55 



Tasmania, 114 

 Taxodium, 40, 123 

 Teak, 109 



Tertiary flora, 22-26 

 Tetrahedral theory, 8 

 Thistles, 61, 66 



Thorn- forest, 36, 105, 107-109 

 Tomillares, 131 



Topography, Ecological, 5 



Trade- winds, 41 

 Transport, 3, 4 

 Tristan d'Acunha, 114 

 Tropical Zone, 102-112, 129 

 Tropophytes, 38, 124 

 Tumble-weeds, 62 

 Tundra, 96, 130 



United States flora, 98 



Valdivia, 116, 118 



Venezuela, 112 



Viola, 54 



Viviparous germination, 106 



Wallace, 82 



Water, 35-39, 47, 48; in soil, 4, , 



48 



Water-plants, 90-94 

 Weeds, 61, 68 

 Welwitschia, 109 

 West Indies, no 

 Wheat, 34 

 Wind, 40-45 

 Wind- witches, 62, 65 



Xanthium, 61 

 Xanthorrhea, 114, "7 

 Xerophilous plants,. 40, 104 

 Xerophytes, 38-40, 100, 105, 12; 



Yakutsk, 32 



Yucca, 60 



Zantedeschia, 108 



Zinc, 54 



Zonation, 58, 128-130; season? 



128; vertical, 128 

 Zone, Northern, 95-102; Trop 



cal,io2-ii2;Southern,ii2-ii 

 Zones of altitude, i, 7O-73', 



heat, 30; latitudinal, 30, 95 

 Zoochores, 66 

 Zostera, 93 



