CHAR AUSTRALES ET ANTARCTICA. 195 
the seed is always placed directly above the antheridium. To this 
division belong the most numerous and DE species, as Ch. 
Jtetida, hispida, ceratophylla, aspera, fragilis, All these have a 
coated or invested stem ; but the same division. bus also uncoated 
species, as Chara coronata, which Ruprecht, in his additions to the 
Russian Flora, separates as a peculiar genus with the name Charop- 
sis,* which separation is not applicable, some species varying with 
coated and uncoated stems. The other division of Chara is the 
subgenus Lychnothamnus of Ruprecht, in which the antheridia are placed 
in the inner part of the circle of foliola, and, being monecious, there- 
fore by the side of the seed. The species of this division are generally 
uncoated, and here are to be included Chara barbata and alopecuroidea. 
According to this division, also, the dicecious species can easily be 
placed in the same arrangement. It is curious, that in New Holland 
the greatest number of species seems to be diæcious, while in Europe 
the moneecious species are far more numerous. 
I now introduce the separate species, enumerating all subdivisions 
of the genera and subgenera, by which it can be seen which of them 
are represented in Australia, and which are not. 
Genus I. NITELLA. 
Subgenus A. NITELL 
a, Nitelle fonna folis ee (nunquam repetito) divisis, segmentis 
fo: 
a, homophy vie; foliis vertielli 6-8 similibus. 
Bg e folis minoribus inter folia 6—8 majora inter- 
f these divisions no peut is found in Australia. To a, belong of European 
species N. flexilis, L., and N. syzcarpa, Thuill. ; to 8, the South American N. clavata, 
ertero. 
b, qs. MASON foliis rarius simpliciter, plerumque repetito divisis, 
segmentis ultimis ex articulis 2, secundo plerumque mucroniformi, for- 
-— 
a, homophylla, ut supra. 
The d T belonging to this division are N. translucens, Pers., mucro- 
nata, A. Br., € Amici, gracilis, Smith, PES Desv, batrachosperma, 
Reichenb. ; the vein species are the followi 
* Charopsis, Kützing, is composed of Lychnothamnus, Ruprecht; and Charopsis, 
Ruprecht 
2c9 
