x LIST OF ILLUSTRATIONS 



FIG. PAGE 



28. View in the Rocky Mountains, showing pines and Douglas 



firs (Photo : A. W. W. Brown) 103 



29. Big trees in the Coastal Forests of British Columbia . 105 



30. Aspen Forest in Colorado (Photo : A. W. W. Brown) . 106 



31. Sage-brush, Colorado (Photo: A. W. W. Brown) . . 109 



32. A typical timbered canon in the Colorado region (Photo : 



A. W. W. Brown) . . . . . . . .111 



33. Dry cereus scrub on steep slopes of a gorge Mexico 



(Photo : A. W. W. Brown) . . . . . .115 



34. Taxodium trees Sacromonte Amecameca (Mexico) (Photo : 



A. W. W. Brown) . .118 



35. Dry scrub and cereus-trees on arid slopes Tuland valley, 



Mexico (Photo: A. W.W. Brown) . . . .121 



36. In a Florida Swamp (Photo : Underwood and Underwood) 122 



37. Undergrowth of a tidal ' bayou' in intertropical country . 126 



38. Physical Features of South America 128 



39. 40. Mean Temperature of South America in January and 



July reduced to sea-level 129 



41. Mean Annual Rainfall of South America .... 129 



42. Seasonal Distribution of Rainfall in South America . .129 



43. Vegetation of South America 130 



44. Tangle of Mangrove roots at low tide British Guiana 



(Photo : Sir E. Im Thurn) 134 



45. Swamp Forest with roots of trees sticking out above flood 



level . . . 137 



46. Forest cutting -Eastern Brazil (Photo : A. W. W. Brown) 139 



47. Araucaria imbricata (Chile pine) . . . . 144 



48. Brazilian Savana, Matto Grosso 146 



49. Paraguayan Forest near Guayra Falls . . . .150 



50. Campos in North Paraguay 151 



51. Subtropical Rain Forest, Paraguay ... .152 



52. Palm Grove in Corrientes, Argentina (Photo : A. W. W. 



Brown) 153 



53. Chanar and dry cereus scrub, W. Argentina (Photo: 



A. W. W. Brown) . 156 



54. Cactus on the dry slopes of the Andes (Photo : Underwood 



and Underwood) 167 



55. A Eucalyptus-clad gorge in the mountains N.E. Australia 172 



56. Physical features of Australia 173 



