Variability in Stellaria Graminea. 79 
An attempt is made to display the correlation between the 
stamens and corolla characters in the diagram (Fig. 2) and in order 
that the representation may not be too complicated, the individuals 
are scheduled as either fertile or male-sterile—the former are 
represented by a large W; the latter by a small w. The male- 
steriles will include a certain number of individuals belonging to the 
intermediate series. The latter do not, as a rule, possess either the 
largest or smallest of corollas and on this account will be 
located toward the middle of the diagram. It will be ascertained 
from the diagram constructed, by the way, from data yielded by 
observing some thousands of individuals) that hermaphrodites with 
a smaller corolla-diameter than 9 mm., and male-steriles with a larger 
corolla-diameter than 11 mm. are rarely found. Hence the flowers 
with the largest and smallest corollas are usually hermaphrodite 
and male-sterile respectively. Flowers with a corolla of medium 
size may be either hermaphrodite or male-sterile, and hence include 
individuals of all three series described above. Hermaphrodite and 
male-sterile individuals with the same corolla dimensions are 
indicated by placing both a large and a small W in the same 
square. 
The ovary. When the anthers are ripe the styles are quite short, 
during the period of dehiscence, the latter roll inward presenting a 
crosier-like appearance, finally, after the pollen is shed, they unroll 
* 
and spread outwards. The styles when outspread, in the fertile 
flowers, scarcely exceed the stamens, hut they are much longer in 
the sterile flowers. Both hermaphrodite and male-sterile individuals 
set good seed. 
Comparison with S. DillENIANA . 
I have not yet had an opportunity of making a thorough com* 
parison of the flowers of the forms of S. graminea with those of the 
forms of 5. Dilleniana. In connection with Stellaria Dilleniana 
and its variations, cf. Moss in New Phyt., December, 1912, Dr. 
Moss informs me that he has found at least four forms of 5. 
Dilleniana in the fen :—(1) with large flowers and glaucous leaves ; 
(2) small flowers and glaucous leaves; (3) large flowers and green 
leaves; (4) small flowers and green leaves. The glaucous form (the 
old Stellaria glauca) and the green form were pointed out to me by Mr. 
Adamson in July, and I measured the flowers of plants of each kind. 
The measurements are as follows:—■ 
