112 



I. H. Burkill — FJoiver of Ranunculus arveusis. 



[No. 2, 



Table XXI. — Stammodes in Keiv plants at different periods ; the periods 

 the same as in Tables XVII and XVIIl. 







Period 1. 



Period 2. 



Period 3. 



Period 4. 



11th August 

 to 23rd 

 August. 







6th July to 



18th July to 



30th July to 







17th July. 



29th July. 



lOth August. 





'Total number 

 Percentage of 



91 



1360 



157:i 



1777 













j^-.^^ 1 fzr z 



2-58 



21-31 



47-49 



56-48 





Average per 

 ^ flower 













030 



1-66 



2-91 



2*78 





r Total number 



23 



1072 



1534 



1178 





Percentage of 











K-. ^- \ tzr z 



0-78 



25-88 



64*73 



54 09 





Average per 

 flower 













0-09 



2 06 



3-98 



2-74 



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

 as in Tables XJX and XX. 





Period 1. 



June 6th to 



July 10th. 



Period 2. 

 July 11th to 

 August 29th. 



Period 3. 

 August 30th 

 to mid-Sep- 

 tember. 



/" Total number 

 J. \ Percentage of stamens 

 ^^^^ '" 1 reduced 



(.Average per flower ... 



24 



2-04 

 0-18 



82 



1-13 



0-09 



- - 



33 



401 

 0-27 



: ; /'Total number 



Heidelberg ... ) ^^^Idutef "' '*'""T 

 C Average per flower ... 



37 



1-86 

 015 



75 



113 



0-08 



36 



2-61 

 019 



I think it will be conceded tliat 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 

 inost of all and before the others. Tables XVII to XX show how the 

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

 this quite evident the following tables are given : — 



