90 THE CRTJCIFEE FAMILY. 



less beaked at the top beyond the end of the valves, the beak consisting 

 either of the conical style alone, or including a portion of the pod itself, 

 with one or more seeds in it. Seeds globular, ovoid, or somewhat flattened, 

 the cotyledons folded longitudinally over the radicle. 



A numerous genus, spread over Europe and northern and central Asia, 

 comprising the Brassica and Sinapis of Linnseus, and divided by other 

 botanists into from three to six or even more genera, variously defined, ac- 

 cording to the peculiar views entertained by each, but all aptly united into one 

 by Boissier. It is distinguished from Sisi/mbriiim and Wintercress essentially 

 by the folded cotyledons, and in most cases by the beak of the pod. Even 

 in tlie two first species, and in the black B., where the beak is not so dis- 

 tinct, the persistent style is more conical at the base than in the Wintercress, 

 and very much longer than in the Sisymbrium. 



Upper stem-leaves entirfe, sessile, or clasping the stem. 

 All the leaves glabrous and glaucous, the upper ones not 



aurieled 4. Cabbage B. 



Eadical leaves more or less hispid, the upper ones auiieled at 



the base 5. Field B. 



AU the leaves pinnately cut or stalked. 

 Six or fewer seeds in each cell of the pod. 



Pods slender and short, closely pressed against the axis of 

 the raceme. Beak small. 

 Pods ending in a slender style, slightly conical at the base . B. Black B. 

 Pods ending in a distinct beak, thickened at the base . . 9. Hoary B. 

 Pods more or less spreading in a loose raceme. Beak large. 



Pod very hispid, rather shorter than the long flat beak . . 6. Mustard B. 

 Pod glabrous, or rough, rather longer than the conical 



beak 7. Charlocks. 



Ten J twelve, or more seeds in each cellofthe pod. 

 Pod H to 2 inches, the beak distinct, with 1 or 2 seeds ... 3. Isle of Man B. 

 Pod slender, not \\ inch long. The beak very short, without 

 seeds. 

 Branched and leaiy perennial, afoot high or more ... 1. Wall B. 

 low annual, the leaves mostly radical 2. Satid B. 



1. 'Wall Brassica. Brassica tenuifolia, Boiss. 

 {Sisymbrium, Eng. Bot. t. 525. Diplotaxis, Brit. Fl. Roelcet.) 



A loosely branched or bushy perennial, 1 to 2 feet high, perfectly glabrous 

 and somewhat glaucous, emitting a disagreeable smeU when rubbed. Leaves 

 very variable, mostly irregularly pinnate, 2 to 4 or 5 inches long, with a few 

 lanceolate or oblong, entire or coarsely toothed segments, the upper leaves 

 often entire or nearly so. Flowers rather large, lemon-coloured. Pods in 

 a loose raceme, about 11 inches]| long, slender, spreading, with numerous 

 small seeds distinctly arranged in two rows. 



Oil old walls, ruins, and waste places, in central and southern Europe to 

 the Caucasus, extending northwards to southern Sweden. In Britain, chiefly 

 in southern England and near the sea. Fl. the whole summer. 



2. Sand Brassica. Brassica muralis, Boiss. 

 {Sisymbrium, Eng. Bot. t. 1090. Diplotaxis, Brit. Fl.) 

 An aimual, branching from the base, usually about 6 inches high, with 

 the same smell as the last. Leaves mostly radical, or crowded at the base 

 of the stems, less deeply divided than in the wall B., and often only 

 sinuate. Flowers much smaller, the pods and seeds similar, but also 

 smaller. 



In fields, cultivated and waste places, very common in southern, and scat- 



