Brassica 



Cruciferae 



491 



Jan. 



Feb 



Mar. 



Apr. 



May 



June 



July 



Aug 



Sept 



Oct. 



Nov. 



Dec 



Miles 



50 



Map 1008 



irassica campestn's L. 



Jan. 



Feb. 



Mar. 



Apr 



May 



June 



July 



Aug 



Sept. 



Oct. 



Nov. 



Dec. 



Miles 



irassica mncea 



50 



Map 1009 



(L.) Cosson 



50 



Map 1010 



rassica niqra (U Koch 



2949. BRASSICA [Tourn.] L. 



[Bailey. The cultivated Brassicas. Gentes Herbarum 1: 53-108. 1922 

 and 2: 207-267. 1930.] 



Upper stem leaves clasping. 



Petals (9) 10-14 mm long; pods (5) 6-10 cm long; beak 10-17 mm long, moderately 

 stout; pedicels ascending; flowers light yellow; leaves glaucous. (See excluded 



species no. 260, p. 1052.) B. Napus. 



Petals 7-11 mm long; pods 3-8 cm long; pedicels spreading. 

 Leaves glaucous, the basal ones lyrate-pinnatifid with a large-toothed lobe at the 

 apex, glabrous or the lower with a few scattered hairs; stem leaves lanceo- 

 late, entire; root slender; sepals 5 mm long; petals 6-7 mm long; beak about 



1 cm long 1. B. campestris. 



Leaves green or glaucous, much resembling those of the preceding species but 

 more or less setose-hispid; root tuberous, much enlarged; petals about 7 mm 

 long, yellow; pods 5-8 cm long, 2.5-4 mm thick, valves with 1 conspicuous 

 nerve. (See excluded species no. 261, p. 1052.) B. Rapa. 



