46 



THE CBUCIFER FAMILY. 



2. Creeping Watercress. Nasturtium sylvestre, Br. 



(Fig. 52.) 

 {Sisymbrium^ Eng. Bot. t. 2324.) 



Stem creeping at the base, the flower- 

 ing branches erect or ascending, a foot 

 high or more. Leaves all or most of them 

 deeply pinnatifid or almost pinnate, the 

 lower lobes distinct and narrow, the ter- 

 Pl minal one often larger and broader. 

 h Mowers yellow and small, although the 

 petals are considerably longer than the 

 calyx. Pod nearly that of the common 

 W., but rather more slender, and the two 

 rows of seeds rather less distinct. 



On river-banks and in wet places, dis- 

 tributed over Europe and Russian Asia, 

 but apparently not so far north as the 

 common W. Sparingly scattered over 

 England and Ireland, and still more rare 

 in Scotland. Fl. summer. 



Fig. 52. 



3. Marsh Watercress. Nasturtium palustre, DC. (Fig. 53.) 



{Sisymbrium terrestre, Eng. Bot. t. 1747. Nasturtium terrestre, 

 Brit. Fl. Yellow Cress.) 



Much resembles the creeping W., but 

 usually weaker and not so tall, the lobes 

 of the leaves rather broader and more 

 toothed, the petals seldom exceed the 

 calyx, and the pod is seldom above 3 

 lines long, slightly curved, the seeds 

 much crowded, in two distinct rows in 

 each cell. 



In muddy and watery places, through- 

 out Europe and Russian Asia, from the 

 Mediterranean to the Arctic regions, 

 in North America, and in Australia. 

 Pretty frequent in England and Ireland, 

 but decreasing considerably in Scotland. 

 FL summer and winter. 



Fig. 53. 



