THE STEM 
2/5, 5/13, 13734. If we take’ 
the second figure in the series 
and then every other figure, we 
obtain the following ascending 
series of divergences: 1/3, 3/8, 
8/21, 21/55. The divergences 
of these series expressed in 
degrees and minutes of cir- 
cumference can be tabulated 
as follows: 
1/2 =180° 
2/5 = 144° 
5/13 = 138° 28’ 
1a /d4 = 137° 39’ 
Vis 120° 
ty Gx eRe 
SP OLe13 76 8 
0 Gare oye 
The largest figure in the as- 
cending series is never as large 
as the smallest in the descend- 
ing series, and both series ap- 
proach the same limit, which is 














Fic. 102. Top view of a stem of the 
unbrella plant (Cyperus flabelliformis), 
showing three-ranked leaves on a 
twisted stem 
The three rows of leaves can be traced by 
means of the axillary buds. (x 4) 


Fig. 103. Coconut palms along a seacoast 

