SYMMETRY OF THE CENTROSPERM X. 285 
The internode-curves of Shoots I and II are obviously normal, regular, and very 
similar. 
The internode-curves of the branches a—c show the change from the normal (ascending- 
descending) type to the purely descending form. 
Lycanis pioica. 
Two specimens of this double species were measured by Mr. A. Deane, but as I do not know whether 
the plant was Lychnis diurna or L. vespertina, I merely give the statistics (without supplying the curves), 
in order to show the regular nature of the caryophyllaceous internode-curve. 
An erect shoot ending in a flower was measured up to the topmost pair of leaves. The following 
results were obtained :—20, 117°5, 112, 90, 67:5, 60, 15. 
The internode-curve is regular and normal. 
The relatively main axis of another specimen had been destroyed above a certain node, and two 
branches, I and Ia, springing from this node had functionally replaced it. The question was as to how 
far the internode-curves of these would be modified. "The result showed that in their proximal regions 
they simulated an erect relatively main axis by having short internodes and producing an ascending 
internode-curve ; but in their distal parts there was no decrease in length of the internodes, so that the 
internode-curves were purely ascending ones of regularity undisturbed save at one point on Branch I. 
Both branches ended in fruits :— 
| | | 
| | 
E 45 8 Wi 1 m | 53 48 62 2285 
Ha aee 4-5 | 19 395 | 475 | 965 ear à 167 
| | : wee” niente 
The statistics suggest that these branches did not grow out until after the injury to the parent axis, 
and show that the strengthened branch still maintained its predominance. 
STELLARIA MEDIA. (Curve 11.) 
One main stem terminating in a flower was measured, the following being the 
results :— 24, 30:5, 35:5, 4.2, 47. 
(The zero-measurements between the two leaves at each node are omitted.) 
