Shafer : Vascular Flora of Allegheny County. 31 



* H. prolificum Linnaeus. Shrubby St. John's-wort. 



* H. ellipticum Hooker. Pale St. John's-wort. 



* H. perforatum Linnaeus. Common St. John's-wort. 



* H. maculatum Walter. Spotted St. John's-wort. 



* H. mutilum Linnaeus. Dwarf St. John's-wort. 



■f H. Canadense Linnaeus. Canadian St. John's-wort. 



SAROTHRA Linnjeus. 



* S. gentianoides Linnaeus. Orange-grass. 

 Hype}-icii}}i nudicaule Walter. 



TRIADENUM Rafinesque. 



E LODE A Pursh. ^ 



* T. Virginicum (Linnaeus). Marsh St. John's-wort. 

 E. campaunlata Pursh. 



Harrison Township, Joseph Johnston's, June, 1900. 



MALVACEAE Necker. 



MALLOW FAMILY. IV-74. 



ALTHiEA Linnaeus. 

 =i^ A. rosea Cavanilles. Hollyhock. 



Sewickly, "ashery," foot of Walnut St., 1893. 



Harrison Township, field of Joseph Johnston, July, 1896. 



MALVA Linnseus. 



* M. rotundifolia Linn^us. Common mallow. 



