28 The Ohio Journal of Science [Vol. XX, No. 2, 



First Plant. 



BRANCH 



No. 1 had 1 bisporangiate flower with 1 carpel and 1 flower with 2 carpels. 

 No. 2 had 1 bisporangiate flower with 2 carpels and 2 flowers with 3 carpels each. 

 No. 3 had all pure staminate flowers. 

 No. 4 had 4 bisporangiate flowers with 1 carpel each, 2 flowers with 2 carpels 



each, 2 flowers with 3 carpels each, 2 flowers with 5 carpels each, and 



1 flower with 10 carpels. 

 No. 5 had all pure staminate flowers. 

 No. 6 had all pure staminate flowers. 

 No. 7 had all pure staminate flowers. 



No, 8 had 1 bisporangiate flower with 7 carpels and 1 flower with 8 carpels. 

 No. 9 had all pure staminate flowers. 



No. 10 had 1 bisporangiate flower with 3 carpels, and 1 flower with 6 carpels. 

 No. 11 had 2 bisporangiate flowers, each with 3 carpels. 

 No. 12 had all the flowers pure staminate. 



No. 13 had 1 bisporangiate flower with 1 carpel, and 1 flower with 2 carpels. 

 No. 14 had all the flowers pure staminate. 

 No. 15 had 1 bisporangiate flower with 6 carpels. 

 No. 16, the terminal branch, had 1 bisporangiate flower with 1 carpel, 1 flower with 



3 carpels, and 1 flower with 5 carpels. 



Second Plant. 



BRANCH 



No. 1 had 1 bisporangiate flower with 1 carpel, 2 flowers with 2 carpels each, and 



1 flower with 9 carpels. 

 No. 2 had 1 bisporangiate flower with 1 carpel, 3 flowers with 2 carpels each, and 



1 flower with 3 carpels. 

 No. 3 had 1 bisporangiate flower with 1 carpel. 

 No. 4 had 1 bisporangiate flower with 4 carpels. 

 No. 5 had 1 bisporangiate flower with 1 carpel, 1 flower with 2 carpels, and 1 



flower with 3 carpels. 

 No. 6 had 1 bisporangiate flower with 7 carpels. 

 No. 7 had all pure staminate flowers. 

 No. 8 had 1 bisporangiate flower with 7 carpels. 

 No. 9 had 1 bisporangiate flower with 5 carpels. 

 No. 10 had 1 bisporangiate flower with 6 carpels. 

 No. 11, the terminal branch, had 2 bisporangiate flowers with 1 carpel each. 



This diversity of sexual expression on different branches of 

 the same inflorescence cannot be due to a diversity of hereditary 

 constitutions, but we must assume that the different degrees of 

 staminate or carpellate expression all come from the operation 

 of a single hereditary complex; maleness or femaleness in any 

 cell or group of cells being determined by some physiological 

 state of the cell or tissue at the inception of the sporophylls of 

 the flower, the physiological state causing the one set or the 

 other of morphological factors involved in the development of 

 sexual structures to become latent or active. We know, for 

 example, that two species of gall-forming insects can, from the 

 same hereditary complex, cause two entirely different galls to 

 appear side by side on a hackberry leaf. The same group of 



