154 POPULAR FIELD BOTANY. 
Cocutearta Danica. Danish Scurvy-grass. Leaves 
very angular and stalked. The smallest of the species. 
The Horse-radish, C. armoracia, is one of this genus. 
It is said to be found wild in the north of England, but this 
is very doubtful. 
TETRADYNAMIA. SILIQUOSA. 
THALAMIFLORA, CRUCIFERZ. 
BARBAREA. (WurntTeER-crEss.) 
Generic Character. Pod with four angles, the seeds in a 
single row. 
BaRBAREA VULGARIS. Bitter Winter-cress, Yellow rocket. 
This is a common plant in damp pastures and hedges, where 
its bright yellow flowers make it conspicuous. It grows 
about two feet high, with a stout, furrowed, and branched 
stalk. Lower leaves lyrate, the last lobe rounded; the 
upper toothed, often having the base so cut as to look like 
distinct leaves. There is another species found in Devon- 
shire, the B. pracox, but it is thought to be hardly wild. 
