NUTRITION OF DROSERA ROTUNDIFOLIA. 25 



Table IV. 



Number of Stems which bear at least one flower (Aug. 8). 



Plate. Starred. Fed. 



1 5 



II 2 10 



III 7 1 



IV 4 7 



V 4 4 



VI. 2 7 



Total 19 34 



or in the proportion of 100 : 1789. 



Here the difference does not run quite uniformly through the 

 six plates. 



The following Table gives the number of healthy leaves on the 

 starved and fed sides of three of the six plates. The healthiness 



was determined by the presence of secretion on the glands. As 



it was impossible to disturb the plants, this counting could not be 



very accurate. 



Table V. 

 Is umber of Healthy Leaves. 



Plate. Starved. Fed 



IV 48 67 



V 78 92 



VI 61 97 



Total 187 256 



Or as 100 : 1369. 



- 



At the same time * the diameter of 45 fed and 45 starved leaves 

 taken at random were measured. As the leaves could not be re- 

 moved, the measurements were rough ; the diameters, exclusive 

 of tentacles, w T ere taken with a pair of compasses and pricked 

 along a line, which was afterwards measured with a millimetre- 

 scale. Forty-five starved leaves gave a total of 301 millims., the 

 corresponding total for 45 fed leaves being 328 millims. ; the pro- 

 portion between the average diameters is therefore 100 : 108*9. 



On Aug. 8th the flower-stems of the fed plants were noticed 

 to be clearly redder than those of the starved plants. This fact 



* The dates of these observations and of those in Table V. were omitted. 

 They were all made about the middle of August. 



