Professor Nordstedt 



t2. Fertile verticills contracted into 

 heads, more or less dense or 

 interrupted. 



ul. Fertile and sterile leaves 3-4- 

 divided, terminal cell of the last 

 segment nearly as thick as the 

 penultimate cell - 



u2. Sterile leaves often simple, fertile 

 1-2 divided. 



vl. Nucleus 300-380)u. long 



v2. Nucleus 200-270/u. long, fertile 

 heads in mucus. 



xl . Fertile verticills loosely condensed, 

 terminal segments of the leaves 

 acute, gradually attenuate - 



x2. Fertile verticills densely con- 

 tracted, terminal segments obtuse 



v3. Nucleus 160-180/i. long, with 5 

 striae 



s2. Monoecious. 



yl. Fertile verticills not contracted 

 into elongated, gelatinous spikes 



y2. Fertile verticills contracted into 

 elongated, gelatinous spikes (in- 

 terrupted at the base. 



zl. Slender ; terminal segments of 

 the fertile leaves 2-3-celled - 



z2. Stouter ; terminal segments of 

 fertile leaves bicellular 



z3. Fertile verticills contracted into 

 small, not gelatinous heads - 



- myriotricha, A. Br. 

 cristata, A. Br. 



tasmanica (F. Miill) A. Br. 

 gelatinosa, A. Br. 

 polycephala, A. Br. 



Hookeri, A. Br. 



leptostachys, A. Br. 

 interrupta, A. Br. 

 tricellnlaris, Nordst. 



2. TOLYPELLA. 



a. Monoecious, ultimate cells obtuse - - - 



b. Dioecious, spec, nova (?), according to Groves. 



glomerata, (Desv.) Leonh. 



3. LYCHNOTHAMNUS. 



Monoecius, oogonia and antheridia on different 

 nodes of the same plant ; radical, uni- 



cellular, globose bulblets 



- macropogon, A. Br, 



4. CHARA. 



A. Haplostephanae. Crown of stipulae consisting 

 of a single (simple) series of cells. 

 a. Ecorticatae. Stem and leaves naked. 



el. Dioecious. Bracts minute or wanting - 

 Terminal segment of leaves short, obtuse 

 (not acute or apiculate) subspec. 

 c2. Monoecious. 



australis, E. Brown. 



plebeja, A. Br. 



