190 THE CAULIFLOWEE. 



tain general differences which separate them. 

 As has been said, the broccolis are all of them 

 hardier than the cauliflowers, and require a 

 longer time in which to develop, so that in climates 

 having mild winters they are usually treated as 

 biennials. In France, the seed whicli is sown 

 about the first of May gives plants which head the 

 following spring before the early cauliflowers come 

 in. The plants are sometimes enabled to pass the 

 winter more safely by being taken up and planted 

 again in a slanting position. 



In the appearance of the heads no difference 

 exists between cauliflowers and broccolis, except 

 that the latter are usually smaller, less compact, 

 and sometimes purple or sulphur colored. All 

 cauliflowers (with one or two exceptions), have 

 white compact heads. The stems of the broccolis 

 are usually taller than those of cauliflowers, the 

 leaves more numerous, larger, stiffer, but more 

 undulated, more rounded at the apex, and more fre- 

 quently having a distinct stem or petiole. The mid- 

 ribs and principal veins are large and white, except 

 in varieties having colored heads, when they have 

 the same color as the head. The color of the leaves 

 is always more glaucous, that is, of a darker and 

 more bluish green, than is usual in the cauliflowers. 



Broccolis, especially the colored varieties, are 

 sometimes said to be more tender in texture and 



