462 



CORRELATION OF DISTRIBUTIONAL FEATURES. 



Table 1 16. — Climatic extremes for Bulbilis dactyloides. 



Plate Temperature: 



34 Days in normal frostless season (/s) 



35 Hot days, fs 



36 Cold days, fs 



37 Remainder summation above 32°, year (thousands) . . 



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



39 Exponential summation, fs (hundreds) 



40 Physiological summation, fs (thousands) 



41 Absolute minimum 



43 Normal daily mean, coldest 14 days of year (°F.) . . . 



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



45 Normal daily mean, year (°F.) 



Precipitation: 



46 Normal daily mean, fs (inch) 



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



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



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



50 Days in longest normal rainy period, fs 



51 Days in longest normal dry period, fs 



52 Mean total, year (inches) 



Evaporation: 



53 Daily mean, 1887-88, fs (inch) 



54 Total annual, 1887-88 (inches) 



Moisture ratios: 



58 Normal P/E, fs 



59 Normal ir/E, fs 



60 Normal P/E, year 



Vapor pressure: 



63 Normal mean, fs (hundredths inch) 



Humidity: 



65 Normal mean, fs (per cent) 



66 Normal mean, year (per cent) 



Wind: 



68 Normal mean hourly velocity, fs (miles) 



Sunshine: 



69 Normal total duration, fs (hours) 



Moisture-temperature indices: 



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



71 Normal P/E X T, fs, exponential method 



72 Normal P/E X T, fs, physiological method 



Low. 



94 

 4 

 



10.0- 

 2.9 

 3.0 

 3.7 

 -54 

 



64.4- 



35 



.033 





 48 

 25 





 21 

 10 + 



.102 

 26.3 



.12 

 .13 

 .12 



233 



37.0 



38.8 



5.8 



1,127 



58 

 563 

 710 



High. 

 323 

 218 

 158 



26.0 + 

 10.3 

 11.3 

 21.4 

 +12 

 53 



78.8 + 

 70 



.143 

 159 

 259 

 100 

 125 

 150'' 

 40 + 



.293 

 96.4 



.94 



1.10 



.94 



540 



71.5 

 74.1 



14.2 



2,343 



611 

 5,744 

 13,000" 



Table 1 17. — Climatic extremes for Koeleria cristata. 



Plate Temperature: 



34 Days in normal frostless season (fs) 



35 Hot days, fs 



36 Cold days, fs 



37 Remainder summation above 32°, year (thousands) 



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



39 Exponential summation, fs (hundreds) 



40 Physiological summation, fs (thousands) 



41 Absolute minimum 



43 Normal daily mean, coldest 14 days of year (°F.) . . 



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



45 Normal daily mean, year (°F.) , 



Precipitation: 



46 Normal daily mean, fs (inch) , 



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



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



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



50 Days in longest normal rainy period, fs 



51 Days in longest normal dry period, fs 



52 Mean total, year (inches) 



Low. 

 25 









 10.0- 



2.6 



2.8 



2.1 

 -59 





 64.4- 

 35 



.009 





 26 

 18 







9 

 10- 



High. 

 334 

 173 

 158 + 

 18.0 + 

 8.6 

 9.6 

 17.6 

 +32 

 46 

 78.8 

 70 



.199 



199 

 294 

 100 

 172 

 299 

 50 



