Jennings : Flora of Alleohenv Counjy. 479 



Ilysanthes attenuata (Muhlenberg) Small. 



The several Allegheny County si^ecimens in the Pennsylvania 

 Herbarium are evidently of this species and not Ilysantlics duhia 

 (LinniTius) Barnhart (/. i:;rafio/oides Bentham) as reported. 



Lactuca virosa Linnaeus. 



This is the common " Comi)ass Plant " of vacant lots, cultivated 

 fields, etc., and not Lactuca scariola Linnpeus, as reported and as 

 generally mistaken by American botanists a {^w years ago. 



Carnegik Museum, 



November 24, 1905- 



