CRUCIFERAE 339 



4. Alliaria Adans. 

 1. A. Alliaria (L.) Britton. Waste places, woods and along road- 

 sides: Ont., N. Y., N. J. and Va. Adventive from Europe. 



Becoming frequent near the larger cities in the range, and along 

 the Hudson River Railroad above Yonkers and near Roslyn, L. I. 



5. Erysimum [Tourn.] L. 

 1. E. officinale L. {Sisymbrium officinale Sap.). In waste places: 

 throughout Eastern N. America. Naturalized from Europe. 

 Common everywhere. 



6. Norta Adans. 

 1 . N. altissima (L.) Britton {Sisymbrium dltissimum L.). In waste 

 places: Quebec and Ont. to Alberta, D. C. and Mo. Ad- 

 ventive from Europe. 



Common throughout the range, except in the pine-barrens, there 

 rare or wanting. 



Sisymbrium Irio L., 5. Loesellii L., and 5. pannonicum Jacq., referable to this 

 genus, have bien reported as occasional waifs. 



7. Cakile [Tourn.] Mill. 



1. C. edentula (Bigel) Hook. In sands of .the seashore: Newf. 



to Fla. and along the Great Lakes, N. Y. to Minn. Also on 

 the California coast. 



Along the sea-coast throughout the range, also along the shores 

 of L. I. Sound and N. Y. Bay; always in sandy places. 



In 1874 at Brooklyn, N. Y., and at Communipaw Ferry, N. J., C. marilima Scop, 

 was collected. It has not been recorded since. 



8. Sinapis L. 



Leaves lyrate-pinnatifid; fruiting pedicels 8-10 mm. long. 1. 5. alba. 



Leaves dentate or lobed; fruiting pedicels 4-6 mm. long. 2. 5. arvensis. 



i. S. alba L. In waste places and fields, mostly escaped from 

 cultivation: Eastern North America. Adventive from Eu- 

 rope. Native also of western Asia. 



Not a very common adventive near the larger cities. 



2. S. arvensis L. {Brassica arvensis (L.) B.S.P.). In fields and 



waste places : E. N. Am. Adventive from Europe. 

 Frequent as a weed. 



