1918] ALLARD—NICOTIANA 185 
An examination of the blossoms showed that the number of 
stamens in most instances was the same as the lobes of the corolla. 
The relations are given in table I. 
TABLE I 
Blossom no Row Corolla lobes| Stamens Result 
ed ye Upper 7 7 Calyx and pistil normal 
eR oe “ 7 6 Lee ae 
Bot ee Aaa # 6 6 a us . " 
Soe ea . 6 6 yx lobes, pistil normal 
S(pink) ee, Second 3 4 Calne’ and pistil normal 
ee ens £ 4 4 4 calyx lobes, pistil normal 
Pete ta ee are “ 4 4 « - “ « « 
cad Beth oh Meee “ 4 4 ae “ « “ 
Se ae eee ae Third 5 5 Blossom normal in all respects 
che eral 0 ai ae Se est ¥ 4 4 Calyx and pistil normal 
In blossom no. to a small, slender division was also evident in 
addition to the 4 large, equallobes. In all the blossoms the stamens 
present were normal in their development. 
In fig. 10 a blossom with a 2-lobed corolla is shown in comparison 
with a normal, 5-lobed blossom of the same plant. This 2-lobed 
blossom occurred on a plant of the second generation of a cross 
between two distinct varieties of N. Tabacum, and was the only 
abnormal blossom produced on the plant. 
BUREAU OF PLANT INDUSTRY 
WASHINGTON, D.C, 
