24 Annals ok the Carnegie Museum. 



•j- B. praecox (J. E. Smith). Scurvy-grass. 



HESPERIS Linnieus. 

 '^ H. matronalis T.inn;cus, Dame's rocket. 



ERYSIMUM LiniK^us. 



* E. cheiranthoides Linnasus. Worm-seed mustard. 



SISYMBRIUM Linnreus. 

 ^- C. oflScinale (Linnaeus). Hedge-mustard. 



f S. altissimum Linnreus. Tall hedge mustard. 



STENOPHRAGMA Celakowsky. 



* S. Thaliana (Linnaeus). Mouse ear cress. 

 Sisyinbriuin Thalianum Gay. 



South Fayette Township, dry, stony point, R.R., west of Bridge- 

 ville, June ii, 1900. 



lODANTHUS Torrey and Gray. 

 THEL YP ODIUM Endlicher. 



* I. pinnatifidus (Michaux). False rocket. 



Patton Township, Wall's Station, Aug. 24, 1869, Rev. S. W. 

 Knipe ; ]\\\\^ 10, 1891, Thomas Seal. 



BRASSICA Linnceus. 



* B. nigra (Linnaeus). Black mustard. 



■\ B. arvensis (Linnaeus). Wild mustard. 



* B. campestris Linnaeus. Turnip. 



Frequently persists for several years. 



