86 Appendix. 



plants, if the gentlemen from the University continue their dep- 

 redations. The following incident was related by the late Miss 

 Clark, and we repeat it as given by her. A number of the stu- 

 dents wishing specimens of this plant for examination, applied to 

 Miss Clark to learn the locality. Upon being informed they 

 straightway proceeded to the place, and dug up all that was to be 

 found. About this time they were reminded of the nearness of 

 the dinner hour by the pangs of hunger which they experienced. 

 So, being without other food, they determined, for once, to let 

 the cause of science take care of itself and ate up all of the 

 specimens they had obtained. Miss Clark used to say, "that 

 when the faculty turned the boys out to grass, they should devise 

 some means by which the extermination of entire species might 

 be prevented." 



By introduced plants, we mean plants which have made 

 their appearance within the last twelve or fifteen years. Of these 

 there are sixteen (i6) species. In identifying one of these, 

 Thlaspi arvense, we have had some difficulty. Dr. A. B. Lyons 

 found it in fruit in 1867, Prof. Harrington found it in 1868, and 

 it was again found in fruit in 1869 ; but not until 1870 was it 

 found in flower. By this time the new edition of Dr. Gray's 

 Botany had been published, and in this we found a description 

 of the plant. 



Among the introduced plants we have some which will give 

 trouble in the future if not soon exterminated. We will mention 

 two. ist, C'ircium arvense or Canada thistle. This is spreading 

 by the roots. Our city authorities prevent its spreading from 

 seed by keeping the tops cut down. The other is Cenchrus trib- 

 uloides or bur grass. It made its appearcnce on the R. R. bank 

 near the City Mills in 1872, only a few plants at first. Now it is 

 spread over an acre or more. 



MISS E. C. ALMENDINGER. 



Ranunculace^. 

 Clematis Virginiana, L. 

 Anemone cylindrica, Gray. 

 Anemone Virginiana, L. 

 Anemone Pennsylvanica, L. 



