316 POPULAR FIELD BOTANY. 
lets. Its lower leaves are large, consisting of five or seven 
distant leaflets, the terminal one being the largest and 
nearly round. Flowers small and white; pods about an 
inch long. 
NASTURTIUM SYLVESTRE. Creeping Nasturtium. Not so 
common, but growing in the same localities. It has yellow 
flowers, the pod is shorter, thicker, and curved a little 
upwards. 
TETRADYNAMIA. SILIQUOSA. 
THALAMIFLOR2. CRUCIFER. 
SISYMBRIUM. (Herpez Musrarp.) 
Generic Character. Pod rounded or angular ; seeds in a single 
row. Calyx spreading, sometimes erect. 
SIsYMBRIUM OFFICINALE. Common Hedge Mustard. Plen- 
tiful in waste places, and by way-sides. One to two feet 
high, with deeply cut leaves, the terminal lobe being very 
large, and the rest pointing rather towards the stalk, which 
forms what is called a rwncinate leaf. ‘The flowers are yellow, 
very small, and the pods closely pressed to the main stalk. 
SisyMBRIuM Ir10. Broad Hedge Mustard, or London 
Rocket. Tn waste ground, chiefly about London, where it 
