186 



NATURAL HISTORY OF PLANTS. 



of Cheiranthus or Sisymbrium, have like them a convex receptacle 

 forming' a depressed cone. The two lateral sepals are more or 

 less gibbous or saccate above their insertion. They may be 



Brassica oleravea (Cabbage). 



Fig. 220. 



Flower, perianth 



removed (^). 



O 



a 



\W 



Fig. 221. 

 Fruit. 



Fig. 223. 

 Transverse section of seed (^). 



Fig. 219. 



Inflorescence. 



Fig. 222. 

 Fruit dehiscing 



erect or spreading in the expanded flower. The petals are ungui- 

 culate, cruciate, variably imbricated in the bud. Near the base of 

 the six stamens, with free subulate filaments, 1 is seen a disk of four 



n. 4949. — Payee, Lee. stir les Fam. Nat., 137. — 

 B. H., Gen., 84, 967, n. 77.—? Corynelobos 

 R(EM., in Linneea, xxv. 7. 



1 Certain monstrous flowers occur, like that of 

 fig. 225, which belongs to a Mustard, a sub- 

 genus that, like several recent authors, we include 

 in Brassica (see pp. 191, 192, figs. 235-241), 

 with the anthers sterile and ill-developed. This 

 condition is associated with partial or complete 

 virescence of the petals, considerable hypertrophy 

 of the ovary, which is here vesicular and folia- 

 ceous, and which in many such flowers has a 

 median vertical groove before and behind, but 

 an incomplete false-septum, or even none at all. 

 We also frequently find in such cases an atrophy 

 of the style, with the ovules usually transformed 



into green foiiaceous blades of very variable form 







Fig. 225. 



