Professor Nordstedt : 



Synopsis of the Australasian Charcaeae. 



1. NITELLA. 



A. Monarthrodactylae, ultimate segiuents of the leaves 

 one-celled. 



a. Simply branched. 



! Dioecious, nucleus with 1 1 striae - - polygyra, A. Br 



b. Repeatedly branched. 



! Monoecious, seuments of leaves large, nucleus 



215/^t lono^ 



iStuartii, A. Br. 



Diarthrodactylae, ultimate segments of the leaves 

 2 (rarely 3-) celled, ultimate cell mucroniform 

 or bi- tripartite, 

 a. Homeophyllae, leaves similar, 

 aa. Dioecious. 



cl. Ultimate cells bi-tripartite - - - 

 c2. Ultimate cells undivided, mucroniform. 

 dl. Nucleus 180-200//. long, covered with 



scattered very small spines 

 d2. Nucleus 230-300//- long. 



el. Fertile spicate heads 1^-2-22 mm. 

 in diameter, 

 fl. Sterile leaves branched with very 

 short tips - - - - - 

 f2. Sterile leaves not branched with 

 very short tips, nucleus punct- 

 ated with minute granules - 

 e2. Fertile whorls not in small spicate 

 heads, 

 gl. Nucleus covered with small dent- 

 ate scales . - _ - . 



g2. Nucleus minutely granular 

 d3. Nucleus 430-470//. long, with small 



granules, more closely together than 



on N. subtillissima - - . . 

 bb. Monoecious. 



hi. Leaves simply branched or twice- 

 trice-divided, the ultimate divis- 

 ions not much abbreviated. 



il. Leaves simply branched. 



kl. Heads not enveloped in mucus 

 (cf. poly arth rod.) . . . 



k2. Heads enveloped in mucus 



i2. Leaves repeatedly branched. 



U. Leaves (commonly) only twice 

 divided (seldom more) 



ml. Antberidium 350fi - - . 



partita, Nordst. 

 Sonderi, A. Br. 



gloeostachys, A. Br. 

 suhtilissima, A. Br. 



penicillata, A. Br. 

 ( = Gunnii, A. Br.) 

 Robertsoini, A. Br. 



remota, A. Br. 



tricellularis, Nordst. 

 microphylla, A. Br. 



conformis, Nordst. 



