430 Delf . — Transpiration in Succulent Plants. 
and the third pair to a less extent. The innermost pairs of leaves grew to 
double their original size and remained perfectly turgid, as far as could be 
seen, throughout the experi- 
ment ; they were, however, 
too inaccessible for accurate 
measurement. 
Very similar results were 
obtained with different species 
of Sedum , but with Salicornia 
the behaviour is quite differ- 
ent. A shoot of Salicornia 
was marked as shown in the 
figure, and the distance be- 
tween the marks observed 
as before with a lens mag- 
nifying ten times. Only the 
lengths were observed, for it 
is almost impossible to obtain 
an accurate estimate of the 
diameter of anything as soft 
as a flaccid Salicornia stem. 
In this plant, as will be 
seen from the figures in 
Table VIII, the younger 
parts suffered first from the 
loss in water, and later the older internodes also showed collapse, the 
whole plant having much less endurance in conditions of drought than 
Mesembryan themum . 
Table VIII. 
Shrinkage in length of Shoots of Salicornia ( probably S. ramosissima) 
during withering. 
Region. Loss % per 24 hours. 
Main Shoot (1) Lowest internode 
1st day 
0 
2nd day 
0 
(2) Next above 
10 
0 
Branch (3) Lowest internode 
0 
10 2 
(4) Next above 
3*6 
6.7 
( 5 ) „ » 
ii *9 
3*2 
(6) „ „ 
n *9 
3.2 
Pringsheim , 1 in a paper dealing with this subject, records some experi- 
ments in which the attempt is made to analyse the water output of adult 
leaves which are both transpiring and supplying water to the growing parts. 
1 Pringsheim, E. : Turgorregulation und Wasserbewegung in welkenden Pflanzen. Prings- 
heim’s Jahrbiicher fur wiss. Bot., 1906. 
Detached shoot of Salicornia 
(probably S. ramosissima'). 
