Variability in Stellaria Graminea. 
75 
The transplanted specimens had been taken, in each case, from 
a patch of 5. graminea producing flowers of the same dimensions. 
These patches were staked so that corolla measurements could be 
made from time to time and compared with those made in the 
greenhouse. The flowers produced by the potted plants during the 
first fortnight after transplanting resembled those produced by the 
parent plants in the open. After this period the flowers produced 
by B plants decreased in size until they became smaller than those 
of the A plants, whilst the flowers produced by the A plants 
remained unchanged until they ceased to bloom. Thus, on June 
25th, the diameter of the corolla, in a plant of form A, measured 
9 5 mm.; in plants of form B, 7 to 7’5 mm., 5 to 10 mm. and 6-4 to 
7 mm. respectively. The experiment was repeated on July 15th and 
yielded a similar result after fourteen days. In the meantime, the 
corolla, of form A, in the field, remained unchanged, measuring 
9 mm. in diameter throughout August until it ceased to flower, but 
in the form B, the diameter measured only 12 mm. on July 29th 
and 12 to 13 mm. on September 24th. A full list of the measure¬ 
ments in millimetres taken is given below :— 
Greenhouse. 
A. 
B. 
Corolla 
Width of 
Corolla 
Width of 
1912. 
Diameter. 
Lobe. 
Diameter. 
Lobe. 
June 6 
... 8 to 9 ... 
— 
15 
— 
25 
9 
— 
15 
— 
J uly 8 
... 8 to 9 ... 
0 8 to 1-0 ... 
14 to 15 ... 
FI to 1*5 
11 
... 8 to 9 ... 
— 
— 
— 
29 
9 
— 
12 
—■ 
Aug.— 
9 
— 
— 
— 
Sep. 24 
• . • ““ • • • 
— 
12 to 13 ... 
1*2 
1913. 
July 31 
• •• 35 ••• 
10 
14 
FI 
1912. 
June 6 
... 8 to 9 ... 
Field. 
15 
25 
... 8 ... 
- -1 
7 to 7-5 | 
6-4 to 7 ... 
- 
July 11 
... 8 
... 
5 to 10 ' 
... 
— 
15 
... ... 
... 
7-5 
— 
