Shafer : Vascular Flora of Allegheny County. 25 



BURSA U^eber. 

 CAPSELLA Medicus. 



* B. Bursa-pastoris (Linnaeus). Shepherd's purse. 



LEPIDIUM Linnaeus. 



* L. Virginicum Linnaeus. Wild pepper-grass. 



* L. campestre (Linnaeus). Field-cress. 



Moon Township, Shafer farm, May 22, 1895. 



Harrison Township, John Potts', near Natrona road, June, 1895. 



RAPHANUS Linnaius. 

 f R. Raphanistrum Linnaeus. Wild radish. 



* R. sativus Linnaeus. Garden radish. 



Frequently persists for several years. 



CAPPARIDACE^ Lindley. 



CAPER FAMILY. IV-33. 



CLEOME Linnceus. 



* C. spinosa Linnaeus. Spider-flower. 

 C. pungens Willdenow. 



Esplin, bank of Ohio River, near P. & L. E. R. R. station, Sep- 

 tember, 1898. 



CISTACE^ Lindley. 

 ROCKROSE FAMILY. IV-78. 

 HELIANTHEMUM Persoon. 

 f H. Canadense (Linnaeus). Rock-rose. 



LECHEA Linnaeus. 

 •j- L. minor Linnaeus. Thyme-leaved pin-weed. 



