30 



BRITISH CHAROPHYTA. 



usually small, often minute (Fig. 7). They are always 

 one-celled and vary in shape from cylindrical (v) and 

 ellipsoid to subglobose (iii) ; they are often sharp- 



FiG. Y. — Stem-nodes showing various forms of stipulodes (after 

 H. Groves) . i, ii. Stipulodes in a single circle (haploBtephanous) : 

 i, Chara Braunii ; ii, Lamprothamniumpapulosum. iii-vi. Stipulodes 

 in a double circle (diplostephanous) : iii, C. tomeniosa ; iv, C. co»- 

 traria ; v, 0. haltica v. affinis ; vi, C. delicatula. 



pointed. In some species they are rudimentary (vi, 

 lower circle). When a double circle of stipulodes is 



