286 DR. P. GROOM ON THE LONGITUDINAL 
The internode-curve is a purely ascending one, and thus deviates from the typical 
internode-curve of a main stem. Its regularity is such that, within the limits of possible 
accuracy of observation, the curve assumes the form of a straight line. 
CERASTIUM ARVENSE. (Curves 12, 13.) 
This plant is much ramified and is largely constituted of lanky thin shoots which have 
long, horizontal, monopodial, subterranean parts whose ends emerge from the soil and 
continue as elongated superterranean shoots. 
Both the branches measured arose as branches of a subterranean shoot, and their 
proximal parts were underground and emitted roots at the nodes, while their more distal 
portions were above ground. In each case the measurements commenced at the basal 
internode of the branch. 
In the subjoined series of numbers a X is placed after the number representing the 
measurement of the highest subterranean internode, and in the curves a X is placed at 
the top of the ordinate representing these internodes. The specimens were collected in 
November, yet the highest measured internodes had not attained their full lengths and 
the shoots terminated in active buds. 
13. 
Branch I :—10, 12:5, 23:5, 18, 18:5, 125, 9, 8, 11:5, 14, 20, 20:5, 23, 25:5 x , 22:6, 20, 
26, 26, 23, 25, 24°25, 22, 21:5, 20, 18:5, 19, 20, 16, 15:5, 13:5, followed by young 
internodes. 
Branch II:—10:25, 17:5, 14:5, 27:5, 32, 17:5, 23X, 23:25, 34, 33°75, 26, 29/5, 225, 
18:5, 15, 16, 18:25, 12, followed by young internodes. 
