132 



one to two feet high, on the banks of streams, and in hedges, 

 flowering in the middle of the Summer. The flowers are 

 crowded on the top of the stems, of a yellow color, soon 

 changing into pointed seed-vessels. Stem leafy, angular, and 

 furrowed. Upper leaves ovate, toothed ; lower leaves lyrate, 

 all sessile. 



CRESS. NASTURTIUM. 



COMMON WATER- CRESS. Nasturtium officinale. 



Plate 10, fig. 2. 



This is a well-known and highly useful salad, cultivated 

 around London abundantly for the use of the inhabitants, 

 besides vast quantities which the farmers' men bring up every 

 market day, gathered in the shallow brooks and rivulets 

 where it naturally flourishes. As soon as the frost has abated, 

 and the water flows along the little ditches arid watercourses, 

 then the pinnate leaves of the Water- cress grow quickly, its 

 crooked stem soon rises and puts forth its pretty white flowers, 

 to be succeeded by round swelled pods, which scatter their seeds 

 and die away. In the Autumn fresh leaves arise and grow 

 vigorously, often continuing alive and flourishing throughout 

 the winter. 



O. S. Creeping Cress, Marsh Cress, and Amphibious Cress, 



HEDGE -MUSTARD. SISYMBRIUM. 



COMMON HEDGE-MUSTARD. Sisymbrium officinale. 



Plate 10, fig. 3. 



A very rigid, upright plant, with flowers of a yellow color 

 in tufts at the top of long thin stems ; at once known by the 

 seed-vessels, which are long, and not lapping over each other, 

 but lying close to the stem itself. Wherever a branch issues from 

 the stem there is also a lobed or lyrate leaf, and in the radical 

 leaves the lobe at the end is round and much larger than the 

 rest, all of them hairy. It grows two feet high, on all waste 

 ground, and continues to flower throughout the Summer. 



O. S. Broad Hedge-mustard, Fine-leaved Hedge-mustard, Common 

 Thale-cress neither of these are by any means rare, especially about 

 London. 



