112 



J. H. Kurkill — Flower of Ranunculus arvensis. 



[No. 2, 



Table XXT.—Staminodes in Keiv plants at different periods ; the periods 

 the same as in Tables XVII aud XVIII. 



Kew, New «{ 



stamens re- 

 duced 



I Average per 



I flower 



078 

 0'09 



25-88 

 206 



64'73 

 3-98 





Period 1. 

 6th July to 

 17th July. 



Period 2. Period 3. 



18th Jnly to ! 30th July to 



29th July, :10th August. 



Period 4. 



11th August 



to 23rd 



August. 



f Total number 



[ Percentage of 



-„ „, , J stamens re- 

 Kew, Old <j dQCed ^ 



1 Average per 

 [_ flower 



91 



2-58 



30 



1360 



2131 



1-66 



157^ 



47-49 

 2-91 



1777 



56'48 

 2*78 



f Total number 

 1 Percentage of 



23 



1072 



1534 



1178 



3409 

 2-74 



Table XXII. — Staminodes in the German races at different periods; periods 

 as in Tables XIX. and XX. 



Bonn 



Heidelberg 



Period 2. 

 July llth to 



August 29th. 



Period 3. 



August 30th 

 to mid-Sep- 

 tember. 



Total number 

 Percentage of stamens 



reduced 

 .Average per flower ... 



'Total number 

 Percentage of stamens 



reduced 

 . Average per flower ... 



2'61 

 0-19 



; I think it will be conceded that poverty of organs and sterility of 

 stamens are alike marks of the plants becoming worn out. 



Different organs are unequally reduced in numbers, the stamens 

 most of all and before the others. Tables XYII to XX show how the 

 different organs are differently affected by the reduction : but to make 

 this quite evident the following tables are given : — 



