ELIOT — OXALIS SUKSDORFII. 



283 



Fig. 2, where the curve 2 intersects the lower group rather than 

 the middle group, to which it properly belongs. 



\3, 



' V ^ 



V 



N 



\ ^ 





' > A ^ 





\ 



^ \;A ¥^ N^ V'V \./ ^■''\-'' V \,./-\!3 



OXALIS SUKSDORFII — No. 2. 



Diagram, compiled from Tables I. to III., showing the relative lengths of stamens and pis- 

 tils in lOO flowers : — t. Pistils of long-styled flowers; 2 and 3, stamens of same ; 4 and 

 S, stamens of short-styled flowers; 6, pistils of same; 7 and 9, stamens of mid-styled 

 flowers ; S, pistils of same. — The bottom of the diagram represents a heiglit of 3.2 mm. 

 from the bottom of the calyx; and the top of the diagram, a height of 12. t mm. above 

 the same level. 



The curves for the stamens of the long- styled flowers, the 

 styles and short stamens of the mid- styled flowers, and the short 

 stamens and styles of the short-styled flowers, run nearly parallel, 

 showing that the usual distance between the lower sets of parts 

 is more nearly constant than that between the longest and next 

 shorter part. 



In O. Si/kdsdorjii the fertilization of the flowers is effected 

 by insects. There are always two sets of stamens to one set 

 of pistils, and therefore, with insects of ordinary size, there is dou- 

 ble the opportunity to carry pollen away, and the opportunity to 



