INDEX. 



79 



Page. 



Transition zone 20-30 



Trees— 



AUeglianian area 20 



Austroriparian area 45 



Carolinian area 31 



Hudsoniaii zone 19 



Gulf strip 49 



Lower Sonoran area 45 



Lower Sonoran zoue 16 



Pacific Coast Transition area ' 27 



Tropical region 52 



Upper Sonoran area 36 



Tree tomato 42 



Tropical region 51-53 



Tropical Florida 52-53 



Areas 51-53 



Birds 52 



Camphor 53 



Citrus fruits 52 



Coftee 53 



Fruits 52-53 



Mammals - 52 



Ramie 53 



Sisal hemp 53 



Tobacco 53 



Turpentine 49 



Upper Austral zone 30-40 



Upper Sonoran area 36-40 



Alfalfa 40 



Birds 36-37 



Cereals 37 



Cowpeas 40 



Fruits 37-40 



Hemp 40 



Kafir corn 40 



Lima beans 40 



Mammals 36 



Nuts 40 



Plants 36 



I'otatoes 40 



Sorghum 40 



Sugar beet 40 



Sweet potatoes 40 



Tobacco 40 



Trees 30 



Vegetables 20 



Walnuts, English 48 



Par^ 



Walnuts, European... ,... 40,45 



Wheat— 



Alleghaniiin area 21 



Austroriparian area 46 



Arid Transition area 25 



Carolinian area 31 



Lower Sonoran area 42 



Pacific Coast Transition area 29 



Upper Sonoran area 37 



Zone langes of 56-57 



White potatoes — 



Alleghanian area 24 



Arid Transition area 27 



Carolinian area 36 



Pacific Coast Transition area 30 



Upper Sonoran area 40 



Zapote bianco 42 



Zone ranges of — 



Apples 57-Gl 



Apricots 1 62 



Cherries 62-64 



Corn 56, 57 



Grapes 04-65 



Nuts 71-72 



Oats , 56,57 



Peaches 05-66 



Pears 07-68 



Plums 68-70 



Strawberries 70-71 



Wheat 56, 57 



Zones- 

 Arctic- Alpine.- 18-19 



Canadian 19-20 



Hudsonian 19 



Life zones of the United States bound- 

 aries, important crops, native species . 1 8-53 



Lower Austral 41-51 



Transition 120-30 



Upper Austral 30-40 



Zone temperatures 54-55 



Arctic 54 



Canadian 54 



Hudsonian 54 



Lower Austral 55 



Transition 55 



Tropical 55 



Upper Austral 55 



