June, 1910.] Plants to be Excluded from Ohio Catalog. 185 



trate condition of Apocyninni I lyperici folium Ait., the Clasping-leaf 

 Dogbane, growing in the blowouts and on the sand-dunes. This 

 is a rather rare plant in Ohio, being at present known only from 

 this locality. The plants growing in less exposed conditions 

 were nearly or quite erect. 



The prostrate condition is brought about by a curve of the 

 single main stem an inch or two above the ground. The lateral 

 branches spread out in a more or less radiating fashion, pro- 

 ducing a very close superficial imitation of a typical mat plant 

 (Fig. 1). The bending over of the steam and branches brings 

 most of the leaves into a more or less vertical position. The 

 peculiarity seems to be an adaptation to the light, but other 

 factors may also have an influence. The cause of the habit could 

 probably be easily determined by experiment. The stems 

 develop abundant anthocyan and the leaves are very glabrous 

 and glaucous. This Dogbane is, therefore, a very perfect xero- 

 phyte being able to endure more easily perhaps than any other 

 plant of the locality the intense light and heat often present in 

 summer on the bare sand of the blow-out. 



A PROPOSED LIST OF PLANTS TO BE EXCLUDED FROM 



THE OHIO CATALOG. 



John H. Schaffner. 



In the December, 1908, Ohio Naturalist, the writer pub- 

 lished a paper entitled " Plants in the Ohio State List not Repre- 

 sented in the State Herbarium." In response to the request 

 for information in regard to these plants a number of botanists 

 have contributed data and specimens which establish a number 

 of species as undoubted members of our flora. In the meantime, 

 considerable work has been done on the plants of the state and 

 the entire state herbarium has been studied more or less critically 

 some of the more diflicult groups by specialists. Many species 

 represented by herbarium specimens cannot stand because of 

 wrong identification. The present list is published with the 

 hope that some may still be verified before publication of a new 

 catalog of Ohio plants. Some records are based on fragmentary 

 or imperfect specimens. In the future, all additions should be 

 based on specimens about whose identification there can be no 

 reasonable doubt. It is proposed, therefore, to exclude all of 

 the species named below unless definite evidence of their exis- 

 tence in Ohio as indicated bv herbarium specimens is forth- 

 coming. 



Probably some species should have been retained without 

 question but it is evident that the only way to obtain a reliable 



