200 CHARJE AUSTRALES ET ANTARCTICA. 
12. N. Antarctica ; monoica (?); caule elongato, nodis inferioribus 
valde incrassatis; verticillis remotis, superioribus laxe congestis, e 
foliis 6—9 inzqualibus, aliis indivisis, aliis simpliciter divisis, seg- 
mentis lateralibus terminali brevioribus, omnibus 4—5-articulatis 
obtusis; seminibus in foliorum geniculo primo congestis, magnis, 
fasciis 8. i 
Kerguelen’ s Land, collected by Dr. Hooker in 1840. 
'The specimens in Sir William Hooker's herbarium are in a state of 
decay, having lost part of their leaves and the greatest part of the seeds ; 
I therefore cannot entirely decide if this species is really distinguished 
from. N. nidifica, which is peculiar to saline water of the north of 
Europe, and particularly to the Baltic. The Antarctic plant seems to 
differ from it by a more slender habit, thicker nodes of the stem, and 
particularly by the larger seeds, which surpass in size those of. all 
other Nifellas, the dark red-brown nut being } millim. long. Finally 
the seeds appear to be placed only on the leaves, and not, as in N. nidi- 
fica, also at the base of the whorl. 
Genus Il. CHARA. 
Subgenus A. LYCHNOTHAMNUS. 
13. Ch. macropogon 
A, Br. in linnea, 17, p.116. Plant. Preiss. 9, p. 147. 
Swan River, collected by Preiss and Drummond (No. 4 et 5 in herb. 
Hook.) 
Among Drummond's specimens ‘of this most curious species there is 
a little dwarf variety, of only three inches in length. To the description 
Pm given I will add the measure of the nut of the seed, length 
4—,74 m., breadth .48—.52. 
species of this subgenus are Ch. jaróata, Meyer, alopecuroidea, 
Del., and J Wallrothi, Ruprecht. 
Subgenus B. CHARA. 
a, Chare haplostephana, stipularum ad basin verticilli serie simplici. 
i. ate, pan’ A 84 "4 
14. Ch. australis; dioica, flexilis et pellucida, omnino ecorticata ; 
caule valido; verticillorum foliis 6 validis, 3-articulatis, articu- 
lis subzequilongis, ultimo obtuso minutissime umbonato vel apicu- 
lato; stipulis ad basin vertieilli minimis, adpressis, inconspicuis ; 
