Shaikk: Vascular Flora ok Allegheny Colmv. 43 



'-'■'■ P. pumila I.inn;i2us. Sand cherry. 



i P. Pennsylvanica (Linnc). Wild red cherry. 



'= P. Virginiana Linnrcus. Choke cherry. 



i P. demissa t Xuttall). Western wild cherry. 



'■'■' P. serotina I^hrhart. Wild black cherry. 



■'■- P. Cerasus LinnKus. Sour cherry. 



=•- P. Avium Linnceus. Sweet cherry. 



■•- P. Padus Linnaeus. European bird cherry. 



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



AMYGDALUS Linmiius. 



'^' A. Persica Linnaeus. Peach. 



Spontaneous throughout the county. 



ROSACEA B. Jussieu. 

 ROSE FAMILY. IV-43. 

 SPIRiEA Linn^Bus. 

 ■> S. salicifolia Linnaeus. Willow-leaved meadow-sweet. 



'■^ S. tomentosa Linnccus. Hardback. 



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



-■= S. sorbifolia Linnaeus. Ash-leaved spiraea. 



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



