TA^ Ohio Naturalist, 



PUBLISHED BY 



The Biological Club of the Ohio State Uni'versity. 

 Volume II, MARCH. 1902. No. 5. 



TABLE OF CONTENTS 



SCHAFFNEK— On tlic Use of Some Common Botaniciil Tfiins 215 



Keli-ekman— Proposed Algological Survey of ( )hio '219 



Ellis and Kkllerman— A New Species of Phyllo.sticta 22;; 



OSBORN— Remarks on the Study of Leaf-Hoppers 224 



Kellerman — Poison Ivy an<l Ivy Poisoning 227 



HiNE— New or Little KnownDlptera 22s 



Tyler — Meeting of the Biological C'lulj 2::!i) 



ON THE USE OF SOME COMMON BOTANICAL 



TERMS. 



John H. vSchaffner. 



The revolution which has taken place in the science of botan}^ 

 during the last lift}' years has given to many of the older terms 

 an entirely new meaning. The following explanations are offered 

 to indicate in a general way the proper use of some of the terms 

 which are continually recurring in the class room and which stand 

 for definite ideas and facts as at present recognized. They will 

 be used b}^ the writer until something better is proposed. 



In the first place, it is of the greatest importance to clearly 

 recognize the alternation of generations in all of the plants above 

 the Thallophytes as well as in those Algae and Fungi where a 

 true alternation exists. The alternation of generations lies at the 

 bottom of the entire evolutionary history of plants and to ignore 

 this fact is to start with confusion as a foundation. With begin- 

 ners one need not go into details, but so far as one does go, so far 

 he should tell the whole truth and leave no room for false impres- 

 sions. It is best to speak of the two generations and the plant 

 individuals only as gametophyte and sporoph3^te and to drop such 

 terms as sporogonium, oophore, and oophyte when speaking of 

 the individual or of the generation. The gametophyte is the 

 sexual generation and the sporoph^'te is the non-sexual one. Sex 

 terms should be used only for the sexual generation and all sex 

 terms should be discarded Avheu the sporoph3'te generation is 

 under discussion. It is just as easy to say carpellate flower as 

 female flower, or staminate tree as male tree. In speaking of the 

 gametophyte, if the two sexes are luiited in one individual the 



