The Flora of the Cayuga Lake Basin 227 



[B. Napus L. Rape. 



An occasional weed in cultivated fields and waste places and by roadsides, mostly 

 in gravelly soil, springing up from seeds accidentally sown, or persisting after 

 cultivation. 



Native of Eu.] 



[B. Napobrassica (L.) Mill. Rutabaga. Swedish Turnip. 

 Fields and waste places, where it occasionally springs up from roots that have 

 wintered over. 

 Native of Eu.] 



1. B. campestris L. 



Waste places and dumps ; occasional. July. 



Road n. of Enfield Glen ; Ferris Place bridge ; athletic field, C. U. campus ; 

 lighthouse road. 



Widely distributed in N. A. Native of Europe. 



[B. Rapa L. Turnip. 



Dumps and waste places, only near Ferris Place bridge. The plant rarely winters 

 over, which accounts for its infrequency. 

 Native of Eu.] 



2. B. juncea (L.) Cosson. Indian Mustard. Leaf Mustard. 

 A weed in waste places and on dumps ; frequent. June-Aug. 



North Spencer ; various places about C. U. campus and the streets of Ithaca, 

 especially on garbage dumps along the lighthouse road. 



Widely distributed, though of recent introduction. Naturalized from Asia. 



3. B. nigra (L.) Koch. Black Mustard. 



A weed in waste places and along streams and lake shores, usually in rich gravelly 

 soils ; common. June-Oct. 



Generally distributed throughout the U. S. and Canada, except in the extreme 

 North. Naturalized from Eurasia. 



4. B. arvensis (L.) Ktze. (B. Sinapistrum of Cayuga Fl.) Charlock. Wild 



Mustard. Summer Mustard. 



A weed in cultivated fields and waste places ; locally very abundant, and a bad 

 weed. June-Aug. 



Widely distributed in N. A. Naturalized from Eu. 



This is the summer mustard of the farmer, especially abundant in oat fields, and 

 maturing later than the spring mustard {Barbarca vulgaris). 



[B. alba (L.) Boiss. White Mustard. 



A weed of waste places, dumps, and roadsides, springing up from seed accidentally 

 scattered, and apparently not established 



Ithaca, Seneca St. (D.) and W. State St.; dump along lighthouse road; dump on 

 South Ave., Ithaca, 1893; near Ithaca fair grounds (IV. C. Muenscher) ; field e. of 

 Freeville (D.) 



Native of Eu.] 



[Raphanus (Tourn.) L.] 



a. Flowers white or purplish ; pods 2-3-seeded, the seed-bearing part short and thick, 

 at maturity often 1(5 mm. in diam. [R. sativus] 



a. Flowers pale yellow (fading to white in herbarium specimens) ; pods 4-10-seeded, 

 the seed-bearing part longer and more slender, 2-3 mm. in diam., grooved. 



[R. Raphaiiistritm] 



