FIELD BOOK OF PONDS AND STREAMS 



t 



branches grow from the stem in whorls, and intemodes, an 



inch or more between. The core of the intemode is made up 



of one cell which extends the entire distance from one node to 



another. Stems and branches also are single cells, but are 



covered by a layer of fine cells like those which surround the 



central cell of the intemode. 



The fruiting organs are of singular beauty and large enough 



to be clearly seen with a pocket-lens. They are borne at the 



Fig. 47. — Nitella. 

 54 



