Shaker : Vascular Flora of Allegheny County. 43 



* P. pumila L.innreus. Sand cherry. 



-j- P. Pennsylvanica (Linne). Wild red cherry. 



* P. Virginiana Linnaeus. Choke cherry. 



t P. demissa (Nuttall). Western wild cherry. 



'•- P. serotina F^hrhart. Wild black cherry. 



-■^ P. Cerasus Linnaeus. Sour cherry. 



=^ P. Avium Linnaeus. Sweet cherry. 



* P. Padus Linnteus. European bird cherry. 



Pittsburgh, spontaneous on the Southside hills, 32d Ward. 



AMYGDALUS Linnaeus. 



* A. Persica Linnasus. Peach. 



Spontaneous throughout the county. 



ROSACEA B. Jussieu. 

 ROSE FAMILY. IV-43. 

 SPIRiEA Linnreus. 

 '•^ S. salicifolia Linnaeus. Willow-leaved meadow-sweet. 



* S. tomentosa Linnaeus. Hardback. 



Harrison Township, wet roadside, John Potts', June, 1895. 



* S. sorbifolia Linnteus. Ash-leaved spiraea. 



Moon Township, escaped to roadsides. Narrows Run, June, 1897. 



