S7 



B. DIPLOSTEPHAN^E ; circle of stipules consisting 1 of a double 

 (rarely triple) series of cells (see Fig. 52.) 



a Not corticated*. 



Fig. 52. 



* Under this section belongs a remarkable form collected by N. L. Britton, Ph. 

 D., in New Jersey. It may be described as a Ch. sejuncta, condensata, ecorticata, 

 nudifolia. It is entirely without cortex on either stem or leaf. It differs from Ch. 



Fig- 53- 



sejuncta in the stipules which are usually very long and slender, in the bracts which 

 are much longer than the fruit and verticellate, and in the coronula of the sporo- 

 phydium which is broad and low, 186 by 80 high, cells closely connivent. Nu- 

 cleus 600 long, 405 broad, black, with fourteen sharp angles. Antheridium, 265 in 

 diam., usually separate from the sporophydium on the same leaf or in different 

 verticils. For the present, until the species can be studied in its fresh state and 

 variations noted (all specimens of the present gathering present uniform characters), 

 this must be known as Britten's Chara (Fig. 53). 



