HOWARD, HOWARD AND ABDUR RAHMAN 



209 



(1) February 9th. A cold day (max. temp. 70°F. ; miu. temp. 30°F. 

 temp, at 8 a.m. 47°F.). 



(2) February 6th. A warm day (max. temp. 86°F. ; min. temp. 53°F.; 

 temp, at 8 a.m. 61 °F.). 



Thus the opening is not only delayed on cold days biit flowers often reopen 

 the following morning and the petals do not fall till the second day. On 

 February 10th, 1916, a very warm, day, some flowers began to show signs of 

 opening as early as 3 a.m., while on February 9th, a cold day, opening did not 

 begin till 7-30 a.m. As a rule on normal warm days, the flowers are fully open 

 between 8-15 and 9 a.m. and from 10 a.m. to 12 noon on cold days. The 

 petals begin to fall on the day of opening and this is generally completed by 

 5 p.m. a few, however, reopen the following morning and the number is 

 considerably increased on cold and cloudy days. 



Pollination. The anthers begin to burst longitudinally when the flower 

 is half open and at this period they stand at a little distance frcm the crowded 



