166 Rhodora [OCTOBER 
than those growing in the shade; 11-13 whorls to the stem being 
commonest under the conditions. 
Next, it was attempted to determine the relative number of lateral 
branches on the verticils of the plants from these sources. For this 
purpose, there was chosen the verticil next to the lowest one on the 
stem, as probably having had the fullest protected growth. 
NuMBER OF BRANCHES IN NEXT TO LOWEST VERTICIL 
e PITT PEST UA - MARRE APDERR 7 -8. 9-139 11.139 195 18 
OG a ey SEE OE. os T... E T hy Bs 
NT hs fa che sess 1 10 20 24 .24 10 6 5 
The inference which may be taken from this table is that plants 
growing in the sun have more leaves on this particular whorl, and on 
probably all the others also. The mode in this case is also from 
11-13. Whether coincidences like the latter could be made a diag- 
nostic feature of the plant could be more certainly determined from 
a larger number of specimens than was available to the writer. Of 
course maturity may play a part, since these specimens were col- 
lected the last week of June. Gray’s New Manual (p. 52) gives 
8-14 ridges as being characteristic for the plant. The whorls in 
shade specimens, while possessing a smaller number of leaves were 
usually spread over a greater space than those fully exposed to the 
sun. In efforts to adjust to the light relation, many specimens 
lost their characteristic storied or conical shape and assumed a one- 
sided form a great deal like that of an ostrich plume. This was 
entirely due to the bending upwards of the leaves on the less illumi- 
nated side of the whorls. 
While sun specimens were observed to be uniformly longer than 
those growing in the shade, a convenient indicative measure of this 
was the comparative number of defoliated nodes in each group as 
counted from the lowest verticil to the rootstock. 
NUMBER OF NODES FROM LOWEST VERTICIL TO ROOTSTOCK 
ee eee Ere ea 1 3 4 | 0 T B3 
5 5 22 32 14 13 
2 22 23 19 ð 
