Australasian Chavaceae. 



iu2. Antberidium 165-200/x, nucleus 

 300-350/w. long, with 8 striae 



in3. Anthei'idium loO-166/x, nucleus 

 230-250 (-300)/x long, 6 striae, 

 minute - . . - . 



m4. Antheridium 200-230/a, nucleus 

 300-320/Jt long, 6-7 striae, large - 



12, Leaves commonly trice divided, 



ultimate segments (3-) 4-6 (-7), 



primary se<,anent longer than half 



the divided leaf, nucleus 300-360/x 



fruit enveloped in mucus 



li2. Sect. Polyglochin or Brachydac- 

 tylae. Upper leaves, in part often 

 four times divided, the ultimate 

 divisions (almost always sterile) 

 forming a 2-4'- cuspidate crown. 



nl. Coronulaof the sporangium short. 



01. Oogonia solitary - - - . 



02. Oogonia aggregated . . - 

 n2. Coronula of the sporangium elon- 

 gated ------ 



to, Heterophyllae. Leaves dissimilar (some 

 smaller ones in the same verticil as the 

 larger). 



pi. Dioecious. 



ql. The ultimate segments inflated - 



q2. The ultimate segments not inflated 



rl. The siuhII adventitious leaves 

 fewer (1-20), larger leaves 1-3 

 times divided. 



si. Smaller leaves 1-6 (-12), terminal 

 segments of leaves commonly 3-5, 

 stem 2o0-720/x in diam. 



s2. Smaller leaves about 14, ultimate 

 segments of leaves commonly 5-7, 

 stem about 1 iiim. in diam., spec, 

 doubtful 



r2. The small adventitious leaves 

 about 40 ; the larger partly 4 

 times divided - - - - 



p2. Monoecious - - - - - 



- leptosoma, Nordst. 



hatrachospevma, (Rchb.) 

 A. Br. 



pseudojlahellata 



f, mucosa (partly). 



pseudoflahellata, A, Br. 

 f. mucosa, Nordst. 



oligospira, A. Br, 

 mic7'ocarpa, A. Br. 



polyglochin, A, Br. 



tumida, Nordst. 



conglohata, A. Br. 



heterophylla, A. Br. 



congesta, A. Br. 

 hyalina (DC), Kiitz. 



■C Polyarthrodactylae. Ultimate segments of the 

 leaves 3-6-celled, often not mucroniforra. 

 b1. Dioecious. 



tl. Fertile \eticills not contracted into 

 heads, sterile leaves of lower 

 verticills simi)le - - . - 



diffusa, A. Hr. 



2a 



