12 
Table 4. — Record of average length of the elongated internodes of 33 timothy 
shoots having six elongated internodes each, collected from an old meadow 
on eight different dates in 1916 
Date 
Number 
of shoots 
included 
in the 
average 
Average length (inches) of internodes 
No. 1 No. 2 No. 3 No. 4 No. 5 No. 6 
May 29 
June 5_. 
June 12 
June 19 
June 26 
July 3.. 
July 10. 
July 18. 
1.50 
2.76 
1.26 
1.91 
2.85 
1.70 
2.70 
1.86 
2. 10 
3.20 
3.37 
3.52 
4.63 
3.37 
4.82 
4.86 
0.30 
.90 
3.92 
6.41 
6.46 
5.65 
7.32 
6.00 
0.10 
.16 
1.90 
5.91 
8.16 
9.77 
11.22 
9.70 
0.08 
.26 
2.69 
7.10 
10.25 
15.20 
17.42 
19.33 
The lowest elongated internode has been numbered 1, and those 
above it follow in numerical order. The length of the upper one 
was measured from the node at its base up to the base of the head. 
MAY 
JUNE 
20 
19 
18 
\7 
16 
15 
14 
<nl3 
u, 2 
1=11 
6 
5 
4 
3 
2 
I 

Fig. 3 
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10 
16 
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1 
— 1— 
— — 
Curves showing relative growth of elongated internodes of timothy shoots. 
These curves are based on data presented in Table 4. Curve No. 1 represents the 
lowest elongated internode ; No. 2, the next one above it, etc. 
On each one of 33, or on 41.25 per cent of the 80 shoots of which 
measurements were made, there was one enlarged internode in the 
haplocorm and five internodes in the culm. 
The lowest elongated internode of a timothy shoot is the first to 
develop, and those above it complete their growth in length, one 
after another, in progressive order, from the lowest to the upper- 
most. Table 4 and Figure 3 show that the lowest elongated inter- 
nodes of the timothy shoots measured in 1916 made practically no 
increase in length after June 5, and the second and third internodes 
