132 PROCEEDINGS OF THE ACADEMV OF [1880. 



The following report iipon the plants introduced through the 

 medium of the Centennial Exhibition was read : 



EEPORT ON PLANTS INTEODUCED BY MEANS OF THE INTEENATIONAL 



EXHIBITION, isre. 



The committee appointed on the 10th of October, IStG, at the re- 

 quest of the United States Centennial Commission, to examine and 

 report upon the subject of the introduction of insects* and plants 

 through the medium of foreign exhibits, respectfully reports that 

 it has delayed reporting on the plants till now in the belief that 

 some solitary plants might be ovei'looked, which producing seed 

 and increasing in following seasons, might be then discovered by 

 their greater numbers. But only those named in the list have been 

 found, and only in isolated specimens showing no disposition 

 whatever to spread and remain with us. So far, therefore, as the 

 object of the committee appointment is concerned, it may be said 

 in effect that no plant has been introduced, to our knowledge, 

 by the agency of the exhibition. 



It is but justice to say that the plants have been collected by 

 our esteemed fellow member, Mr. Isaac Burk, whose familiarity 

 with the botany of Fairmount Park, rendered him particularly 

 fitted to detect any new introduction. Some of the few plants 

 named are from the western portion of our country, others from 

 Europe, and a few from Japan. 



Lepidium sativum, L. Killingia pumila , M:ic. 



Bunias Erucago, L. Fimbrutylis miliacea, Muhl. 



Crepu tectorum, L. Cyperus diandrus, Torr. 



Centaurea nigra, L. Triticum viUosum, Beand. 



HypochcRris radicata, L. Triticum clavatum, Stedl. 



Desmodium tomentosum, D. C. Leucoea Langsdorffiana, Steudl. 

 Cycloloma platyphylla, Moq. 



Respectfully submitted. 



John L. LeConte, 



Geo. H. Horn, 



Joseph Leidy, 



J. Gibbons Hunt, 



Thomas Meehan, 



Committee. 



*The report upon the insects was printed in the Proceedings of the 

 Academy of Natural Scienees of Philadelphia, for 1876, page 267. 



