THE STRUCTURE OF CERTAIN NEW HYBRIDS. 167 
of secretion, the organs themselves being often difficult to detect by the 
naked eye. 
The stipules resemble those of the female parent considerably, but are 
not so markedly one-sided, and the apical point is not nearly so long. 
On the whole, the characters of the hybrid, as represented by the 
vegetative organs, have a greater leaning to that parent than to the 
other, P. alba. 
For purposes of comparison it should be stated that the plant of 
Fic. 77.—Turee-Losep Lear or P. Constance Exuior x P. anpa (nat. size) 
P. Constance Elliot, used as the seed parent, bears a very much larger 
proportion of seven-lobed leaves than is borne on the plants of 
P. cerulea grown at St. Andrews, and the lobes are distinctly 
narrower. The additional lobes, however, are to be regarded simply 
as outgrowths or branches of the two lowest of the five lobes in the more 
typical leaf. 
