34° CRUCIFERAE 



9. Brassica [Tourn.] L. 



None of the leaves clasping the stem, the upper sessile. 



Pods slender, 1-2.5 cm - long, appressed. 1. B. nigra. 

 Pods rather slender, 2-5 cm. long, not appressed. 



Leaves merely toothed or lyrate-pinnatifid. 2. B. juncea. 



Leaves laciniate, at least marginally. 3. B.japonica. 



I pper leaves clasping by an auricled base. 4. B. campestris. 



i. B. nigra (L.) Koch. In fields and waste places: common 

 throughout N. Am. Naturalized from Europe. 

 Throughout the range, except in the pine-barrens, there rare or 

 wanting. 



2. B. juncea (L.) Cosson. In waste places: N. H. to Pa., Mich., 



Va. and Kan. Adventive from Asia. 



Not uncommon near the larger cities in the range, often wanting. 



3. B. japonica Siebold. In waste places: Me. to Ga. Adventive 



from Asia. 



Known definitely only as a rare adventive in Conn. 



4. B. campestris L. In cultivated grounds, sometimes persisting 



for a year or two: E. N. Am. Fugitive from Europe. 



Not uncommon near the larger cities and along the edges of 

 cultivated fields. 



The rape, B. napus L., and the cabbage and its horticultural allies, B. olcracea L. 

 are sometimes found as weeds in the area. Among other fugitive species are B. 

 monensis Huds., and B. Rapa L. 



10. Diplotaxis DC. 



Perennial; stem leafy nearly to the inflorescence. 1. D. tenuifolia. 



Annual; leaves mostly basal, oblanceolate. 2. D. muralis. 



i. D. tenuifolia (L.) DC. In waste places and on ballast: N. S. 

 to N. J. and Pa. Adventive from Europe. 



Near New York and Philadelphia, and from a few stations in 

 Connecticut. 



2. D. muralis (L.) DC. In waste places and on ballast: N. S. 

 to N. J. and Pa. Adventive from Europe. 



Not a very common adventive near the larger cities of the area. 



Diplotaxis erucoides DC. and D. virgata DC. have been reported from, but are very 

 doubtfully established within our area. 



11. Raphanus [Tourn] L. 



Flowers yellow, sometimes white; pod longitudinally grooved, 4-10 



seeded. I. R. Raphanistrum. 



Flowers pink or white; pod not longitudinally grooved, 2-3 seeded. 2. R. sativus. 



