Jennings: Flora oi' Alle(;heny County. 475 



Aronia arbutifolia (T.innceus) Medicus. 



Harrison Township, in swamp below Joseph Johnston's house, 

 J. A. Shafer, July i6, 1897. 



Crataegus cristata Ashe.- 



J. A. Shafer, " C" " Roadside near S. S. Jordan's, May 16 and 

 October 8, 1901. Roadside near Windsor, J. A. Shafer, Septem- 

 ber, 1 1 , 1897. 



Crataegus crocata Ashe.-^ 



J. A. Shafer, " F'- " Robinson Township, near school-house, 

 Moon Run. May 28 and October 13, 1901. Also J. A. Shafer, 

 " F " Wm. Scott's iield, near Beaver road, Moon Township, June 

 3 and October 7, 1901. 



Crataegus eburnea Ashe.^ 



Type tree in Darlington Hollow, O'Hara Township, J. A. 

 Shafer, June 8, 1901. 



Crataegus pennsylvanica Ashe.^ 



J. A. Shafer, " 17 A." Type Tree is near the Fleming school - 

 house, Stowe Township, August 7, 1901. 



A very distinct form quite common about Pittsburgh. 



Crataegus porrecta Ashe.'' 



Type near the Museum, Schenley Park, Pittsburgh, J. A. Shafer, 

 May 27 and October 4, 1901. 



Cassia medsgeri Shafer." 



J. A. Shafer, Allegheny County, 1900. Also John M. Milligan, 

 August 3, 1901 . 



Polygala nuttallii Torrey & Gray. 

 Euphorbia heterophylla Linnsus. 



Bellevue Cemetery, Allegheny City, John Ferguson, October, 

 1890. Escaped from cultivation. 



Callitriche austini Engelmann. 



Dr. \\". R. Hamilton, Pittsburgh, June, 1904. 



2.\NNALS Carnegie Museum, Vol. I., p. 392-3. March, 1902. 

 ^An.nals Carnegie Museum, Vol. I., p. 389, March, 1902. 

 <.\NNAi.s Carnegie Museum, \'o1. I., pp. 395-6, March, 1902. 

 '.Annals Carnegie Museu.m, I., 394-5, March, 1902. 

 ''Annals Carnegie Museum, I., 391, March, 1902. 

 ■ Torreya, IV., 179-181, December, 1904. 



