Shafer : Vascular Flora of Allegheny County. 101 



=»= Q. macrocarpa Michaux. Mossy-cup oak. 



McKees Rocks, on Creek near Schoolhouse. 



* Q. platanoides Lamarck. Swamp white oak. 

 Q. bicolor Willdenow. 



Stowe Township, low woods on Graham place, Sept. 15, 1899. 



* Q. Prinus Linnaeus. Rock chestnut oak. 



t Q. acuminata (Michaux). Yellow oak. 

 Q. Muhlenbergii Engelmann. 



t Q. prinoides Willdenow. Chestnut scrub-oak. 



Richland Township, near Bakerstown. Hon. J. D. Shafer. 



* Q. rubra Linnaeus. Red oak. 



* Q. coccinea Wangenheim. Scarlet oak. 



* Q. velutina Lamarck. Black oak. 

 Q. tine tori a Gray. 



* Q. palustris DuRoi. Pin oak. 



? Q. digitata (Marshall). Spanish oak. 

 Q. falcata Michaux. 



f Q. nana (Marshall). Bear scrub oak. 

 Q. ilicifolia Wangenheim. 



f Q. Marylandica Muenchausen. Barren oak. 

 Q. nigra Linnseus. 



* Q. imbricaria Michaux. Laurel oak. 

 ? Q. Phellos Linnaeus. Willow oak. 



