4o8 
J. ARTHUR HARRIS 
In these three cases the bulb or rootstock sends up only a single 
inflorescence. The correlation for length and ovules and seeds in 
Sanguinaria is much closer to the rpo and rps in beans than are the cor- 
relations in Nothoscordium and Allium. This is perhaps to be expected, 
since in the two Liliaceae the correlation is between the length of a 
main axis and the number of secondary axes originating from it, while 
in Sanguinaria and in the beans the correlation is (roughly speaking) 
between the degree of development of the axis and the characteristics 
of the ovaries which it produces. 
That the correlations in Sanguinaria are sensibly higher than the 
average values for beans may be due in part to chance — a few of the 
values for beans reaching almost the magnitude of those found in the 
blood-root. It is perhaps more probable that the higher value in 
Sanguinaria is due to the facts (a) that the correlation is between two 
intimately associated organs — a single fruit terminating the simple 
axis the length of which furnishes the measure of the degree of somatic 
development, whereas in garden beans the axis is extensively divided — 
and {h) that Sanguinaria is a perennial and there is doubtless consid- 
erable age heterogeneity which probably tends to raise the correlation. 
If one extends the range of comparison to include the relationships 
within inflorescences there are several available constants. 
In Crinum longijolium^ I have found for fruits per inflorescence 
and seeds per fruit, rfs =- .072 dr .024. For the inflorescence of 
Celastrus scandens^ I have shown 
For flowers and seeds, r = .033 zb .013, 
For fruits and seeds, r = - .012 db .013. 
In Staphylea the correlation between number of fruits per inflores- 
cence and number of ovules and seeds per pod has been investigated^" 
for series of individual shrubs, as well as for random collections from 
numbers of shrubs. It is difficult in these cases to be sure of even the 
sign of the correlation. The correlation for number of fruits and length 
of fruit is low.^^ Those for number of fruits and radial asymmetry and 
locular composition are also very small. 
For three series of intact inflorescences from individual trees of the 
legume Cercis canadensis in which the number of ovules in the ovaries 
8 Ann. Rept. Mo. Bot. Gard. 23: 89-91. 1912. 
«Ann. Rept. Mo. Bot. Gard. 20: 120-122. 1909. 
10 Beih. Bot. Centralbl., Abt. i, 28: 2-10. 1911. 
Bot. Gaz. 53: 401-402. 19 12. 
12 Zeitschr. Ind. Abst.- u. Vererbungslehre 5: 183-187. 191 1. 
