BOGS, MARSHES, WET PLACES— SUMMER 237 



from seven to eleven wavy or slightly-toothed segments, the terminal 

 one of which is usually larger than the others and nearly round. 

 The flowers are small, white, in short, crowded racemes ; and the 

 pods are spreading, more than half an inch long. 



2. The Marsh Yellow Cress {N. palustre), common in muddy 



The Lesser Spbarwort. 



places. — A slender plant with a fibrous root, and pinnate leaves 

 with irregularly-toothed segments which are smaller towards the 

 base. The flowers are yellow, about an eighth of an inch in diameter, 

 with petals no longer than the sepals. They bloom from June to 

 September. The pods are oblong, swollen, sHghtly curved, a quarter 

 of an inch long. 



3. The Amphibious Yellow Cress {N. amphibium). — An erect 

 plant, two or three feet high, with fibrous root and creeping runners, 



