CORRELATION OF DISTRIBUTIONAL FEATURES. 



433 



Table 72. — Climatic extretncs for Bulbilis daclyloides, region of frequent occurrence 



(subcenter) — Continued. 



Plate 

 53 

 54 



58 

 59 

 60 



63 



65 

 66 



68 



69 



70 

 71 



72 



Evaporation: 



Daily mean, 1887-88, fs (inch) 



Total annual, 1887-88 (inches) 



Moisture ratios: 



Normal P/E, fs 



Normal ir/E, fs 



Normal P/E, year 



Vapor pressure: 



Normal mean, fs (hundredths inch) 



Humidity: 



Normal mean, fs (per cent) 



Normal mean, year (per cent) 



Wind: 



Normal mean hourly velocity, fs (miles) . . 

 Sunshine: 



Normal total duration, fs (hours) 



Moisture-temperature indices: 



Normal P/E X T, fs, remainder method . . . 



Normal P/E XT, fs, exponential method. . 



Normal P/E X T, fs, physiological method 



Low. 



.122 

 31.0 



.44 

 .47 



.58 



373 



59.4 

 59.3 



7.4 



1,127 



1,590 



lOO-" 

 1,000 -o 



High. 



.201 

 55.4 



.91 

 1.07 



.87 



466 



67.8 

 70.4 



14.2 



2.057 



3,781 



500« 

 10,000° 



Table 73. — Climatic extremes for Bulbilis dactyloides, region of greatest abundance (center). 



Plate 

 34 

 35 

 36 

 37 

 38 

 39 

 40 

 41 

 43 

 44 

 45 



46 

 47 

 48 

 49 

 50 

 51 

 52 



53 



54 



58 

 59 

 60 



63 



65 

 66 



68 



69 



70 

 71 



72 



Temperature: 



Days in normal frostless season (fs) 



Hot days, fs 



Cold days, fs 



Remainder summation above 32°, year (thousands) . 



Remainder summation above 39°, fs (thousands) . . . 



Exponential summation, fs (hundreds) 



Physiological summation, fs (thousands) 



Absolute minimum 



Normal daily mean, coldest 14 da5's of year (°F.) . . 



Normal daily mean, hottest 6 weeks of year (°F.) . . 



Normal daily mean, year (°F.) 



Precipitation: 



Normal daily mean, fs (inch) 



Normal No. rainy days (over 0.10 inch), fs 



Normal No. dry days (0.10 inch or less), fs 



Dry days, percentage of total, fs (per cent) 



Days in longest normal rainy period, fs 



Days in longest normal dry period, fs 



Mean total, year (inches) 



Evaporation: 



Daily mean, 1887-88, fs (inch) 



Total annual, 1887-88 (inches) 



Moisture ratios: 



Normal P/E, fs 



Normal ir/E, fs 



Normal P/E, year 



Vapor pressure: 



Normal mean, fs (hundredths inch) 



Humidity: 



Normal mean, fs (per cent) 



Normal mean, year (per cent) 



Wind: 



Normal mean hourly velocity, fs (miles) 



Sunshine: 



Normal total duration, fs (hours) 



Moisture-temperature indices: 



Normal P/E X T, fs, remainder method 



Normal P/E XT, fs, exponential method 



Normal P/E XT, fs, physiological method 



.070 

 13 

 60 

 46 

 20 

 38 

 20- 



.166 

 41.3 



.39 

 .43 



.38 



370 



57.6 



64.7 



8.8 



1,300-" 



1,711 



100 -a 

 2,000-'' 



.103 

 57 

 140 

 92 

 59 

 88 

 20 + 



.203 

 .54.6 



.60 

 .73 

 .51 



431 



65.3 

 66.9 



11.5 



1,900 -h" 



3,000 +<» 



400« 

 7,000a 



