30 



BRITISH CHAKOFHYTA. 



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- 



IV 



VI 



FIG. 7. Stem-nodes showing varkms forms of stipulodes (after 

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

 i, Chara Braunii ; ii, Lamprothamnium papulosum. iii-vi. Stipulodes 

 in a double circle (diplostephanous) : iii, C. tomentosa ; iv, C. con- 

 traria ; v, C. baltica v. ajffinis ; vi, C. delicatula. 



pointed. In some species they are rudimentary (vi, 

 lower circle). When a double circle of stipulodes is 



