LUME XXXVIII NUMBER 4 
BOTANICAL GAZETTE 
a OCTOBER, 1904 
THE RELATIONSHIPS OF SEXUAL ORGANS IN PLANTS. 
CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY. 
LXIII. 
BRADLEY MOORE DAVIS. 
_ Tuis paper will attempt a classification of the sexual organs of 
‘Plants based upon certain evolutionary principles and involving 
genetic relationships in so far as these are understood. With 
Classification is presented a terminology new in certain respects 
Testricting some older names to a more precise significance. The 
lishment of a terminology is of course a matter of usage. The 
Present Suggestions are not offered through the desire to create a 
| REW set of terms, but rather as a means of making plain the funda- 
4 mental characters of the classification. But there are some features 
E which if adopted would lead to much greater clearness of expression. 
‘ Almost all of the sexual organs of plants fall into one of three 
PS; quite distinct from one another, each marked by fundamental 
ts so well defined that one form cannot pass into the other 
CRoept through great changes of structure and behavior. The only 
i. ©rgans whose positions do not seem to be clear in this classifi- 
aed the complex multicellular structures of the lichens and the 
beniaceae. The conditions in these interesting forms are 
eprint and much more must be known of their cell and 
oo and developmental history before we can hope to 
ei « ” relation to other forms. The three great groups of 
; 5 a. plants are: : - 
a r structures developing uninucleate gametes.—These 
» May be called collectively gametocysts or, when sexually dif- 
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