



256 



BOTANICAL GAZETTE 



[APRIL 



sufficient; while for another portion of the same flower, after 



4 days at 25 a 



1. 1 



molecular solution is necessary. 



TABLE III 



Species 



io' 



Trifolium incarnatum, 10 corollas, 

 2 days 



Trifolium repens, 10 flowers, 2 days 

 Nectar washed from same 



Trifolium repens, 10 flowers, 2 days. 

 Nectar washed from same 



Medicago sativa, 10 flowers, 4 days 



Caragana frutescens, 10 flowers, 



2 days 



Nectar washed from same 



Fagopyrum esculentum, 10 flowers, 



4 days 



Nectar washed from same 



Salvia splendens, 10 corollas, 4 days 

 Coleus Blumei, 10 corollas, 4 days. . 

 Taraxacum officinale, per gm. flowers, 



1 day 



Taraxacum officinale, per gm. flowers, 



1 day 



0.56 



°-93 

 0.0 



3 44 



3755 

 0.64 



0.69 

 1.36 



38.7 

 15 6 



19' 



O.63 



I. 12 



O.O7 



O.63 



O.O 



2.08 



22. 22 

 4.80 



0.73 

 O.80 



25.7 

 O.86 



45 ° 



17. I 



25 



0.43 

 O.94 



0.02 



0.47 

 O.O 



O.52 



n-95 

 2.00 



o. S 8 



0.0 



138 

 0.78 



19-3 



11. 9 



30 



0.38 

 0.70 



O.OI 



12.9 

 0.62 



139 



not 



develop 



ing 



10° 



( 23 over 

 night) 



O.56 

 0.08 



2433 



2.88 











What is the influence of low temperature ? Mt) 



accumulat 



temperature is below id 



and various other plant organs. He 



same 



comes from the digestion of starch or oil more 



destruction 



temperat 



from 



ture in the twigs of woody plants is a well know r n phenomenon 

 which is amply discussed by Fischer (8) . Indeed this accumula- 

 tion seems to be rather common in its occurrence among plant 

 tissues. Besides being applicable to floral tissues, as table III 

 clearly shows, it affects the leaves and the peduncles of white clover, 

 the former after 2 days' treatment having 30 per cent more sugar 



than at 25 . The evidence 



more 



uniform 





