350 BOTANICAL GAZETTE [NOVEMBER 
107,464, which gives a mean of 26.866 tothe head. The distribution 
of these rays is indicated in Table I. It will be observed that were 
these figures plotted the result would be a two-humped curve, indi- 
cating modes on 21 and 34. 
If I combine with my own figures those given by Tower (6) and 
by Pearson and YuLE (4), the resulting table (Table II) will be 
TABLE I based on a total of 140,988 ray florets 
DISTRIBUTION OF RAYS FOR 5585 from 5585 heads, collected from five 
HEADS, BASED ON paTA os- different localities by several different 
riesgo was doe. PEARSON observers. It may be observed that 
sookonls this table indicates modes on 21 and 34. 
— Heads The mean number of rays to the head 
si - q for this set is 25.242+. These results 
23 z coincide with those which have been 
ne 43 obtained in Germany in that modes 
16 7 are evident on 21 and 34; but differ 
13 ai from them in that no modes appear 
ss nae on 13 or 8, the next lower terms of the 
21 <S Fibonacci series. In fact, out of the 
ee $36 whole number only 6 heads had less 
oe 342 than 13 rays and none had less oi 5 
26 ps 11. On the whole, then, observations 
28 pe seem to show that the daisy of this 
= 219 country has prevailingly more ays 
31 ie than the European plant, but that the 
32 242 numbers produced fall around the same ' 
34 324 modes which have the same relative 
ash prominence, except that no aren 
of 27 modes occur on 13 or 8 in the Amer 
. : ican material so far examined. 
. 3 Such facts have generally been co™ 
> Stoned es indicating that no essential 
alteration has taken place in the flowers of our daisy since ™ 
introduction into this country, but FERNALD (2) has lately called 
attention to the fact that the common American form is not te 
typical Chrysanthemum Leucanthemum 1. , but a variety (pi nati 
dum Lecoq and Lamatte) not usually met with in Germany. — 
4 
a 
