220 The Botanical Gazette. [June, 
In places, small portions of the inner epidermis seem to 
have been resorbed, but generally its separated elements per- 
sist and become united to the adjacent inner integument. 
This union is distinctly seen under high magnification after 
treatment in warm potassic hydrate. This soldering together 
of ovary wall and integument takes place late in the history 
of the fruit, probably after the ‘‘green-ripeness” of Kudelka. 
Occasionally cells of the inner epidermis are found soldered 
to the compacted cells of the ovary wall indicating that the 
union took place after the two tissues had been brought near 
together. As a result of compression and resorption, the 
ovary wall having an average thickness of about 0.4™ at the 
time of flowering has been reduced to a thickness of about 
0.145" in the ripe fruit. 
In a ripe grain, the inner integument is visible only after 
treatment with potassic hydrate, and then in radial and cross 
sections of the grain as a line only. In tangential sections 
only is its cellular structure distinguishable. In close con- 
tact with it is the epidermis of the nucellus. This is likewise 
strongly compressed but the lumina of its cells can be d 
Triticum vulgare Vill. | 
of the ry* : : 
mpletenss) 7 
Its reachee 
As the developmental history of the wheat and 
has been described with a greater degree of CO 
than the corn, I shall here give very briefly the resu 
in the study of the wheat. 
: At the time of the maturation of the babi 
roadly conical in outline with the apex directe¢ h by 
The posterior side is traversed for nearly its entire length by 
