CRUCIFEROUS TRIBE 



29 



23. Brassica (Cabbage) 



1. B. tenuifolia (Wall Rocket). Stem erect, slender, smooth, 

 leafy ; leaves narrow, smooth, deeply divided into narrow segments ; 

 pods lined, slightly beaked, erect. A slender, branched plant, 

 from 1-2 feet high, with a tough stem, woody below, scattered 

 foliage, and large light yellow flowers ; it grows on old walls, 

 quarries, and waste places, principally in the neighbourhood of 

 large towns. Fl. all the summer. Perennial. 



2. B. muralis (Sand Rocket). An annual, with a bristly stem, 

 is very like the last, but smaller, and grows in barren places near 

 the sea, but is not considered indigenous. 



3. B. Monensis (Isle of Man Cabbage). Leaves glaucous, pinna- 

 tifid ; stem nearly leafless, and 6-12 inches high ; pods 4-angled ; 

 flowers bright lemon-coloured, veined with purple. Sandy sea- 

 shores on the western coast of Britain, rare. Fl. summer. Per- 

 ennial. 



4. B. oleracea (Sea Cabbage). Root stem-like, fleshy; stem 

 branched, 1-2 feet high ; leaves perfectly smooth, glaucous, waved, 

 lobed ; stem-leaves oblong, obtuse ; flowers lemon-coloured and 

 large. The original of all the varieties of garden cabbage 

 growing on several parts of the sea-coast. Fl. May to August. 

 Biennial. 



5. B. campestris (Common Wild Navew). Root-leaves pinnate, 

 with rounded terminal lobe, toothed, roughish ; 

 stem-leaves smooth, heart-shaped, tapering 

 to a point ; all somewhat glaucous ; stem 

 about 2 feet high, usually unbranched. 

 Borders of fields, common. Often con- 

 founded with Charlock, from which, how- 

 ever, it may readily be distinguished by 

 the smoothness and glaucous hue of its 

 upper leaves. Fl. June, July. Annual. 



B. rapa, Rape or Colza ; B. rutabaga, 

 the Swedish turnip, commonly known as 

 Swede ; and B. napus, the Turnip, are all 

 varieties in cultivation. 



6. B. alba (White Mustard). Pods bristly, 

 rugged, spreading, shorter than the flat two- 

 edged beak ; leaves pinnatifid ; flowers rather 

 large, yellow. The young leaves of this 

 plant are used as salad. Waste ground. brassica Campestris 

 Fl. June, July. Annual. / Common Wild Navew) 



