OF SOUTH AUSTRALIA. 
97 
KEY TO THE GENERA. 
a. Sporangiferous threads girding definite regions 
of the th alius ringwise. These regions 
appear in consequence swollen. 
b. Frond umbellately branching, the extremi- 
ties bearing loose heads of pencils . . Bellotia Harvey. 
bb. Frond racemosely branched, the extremities 
bearing tufted pencils. Sporangiferous 
regions along the main rachides in long 
patches Encyothalia Harvey. 
bbb. Frond racemosely branched, coarse, form- 
ing a horsetail. Sporangiferous regions 
terminating the axes, elongate Perithalia J. Agardh. 
aa. Sporangiferous threads rising under the tips of 
the branches. 
c. Sporangiferous regions cylindrical, globose 
or club-shaped, beneath pencils of 
deciduous hairs Sporoclinus 
C. Agardh. 
cc. Sporangiferous regions shortly conoid or 
mitriform. No pencils of plumes . . . Carpomitra 
Kuetzing. 
BELLOTIA Harvey. 
Frond filiform, solid, repeatedly umbellately branched, the branches 
crowned with a tuft of penicillate filaments. Sporangiferous receptacle 
solitary in each branch, cylindrical, surrounding the middle portion of the 
branch, composed of simple vertical, densely crowded filaments. Spores 
borne laterally on the filaments, oblong, transversely striate. 
Bellotia eriophorum\ Harvey. 
Fronds many from the same base, 30 to 60 cm. high, twice as thick as a 
hog’s bristle, twice or thrice umbellately decompound. Umbels with 20 to 30 
rays each 5 to 10 cm. long, the summits crowned with a dense globular 
penicillate tuft of slender jointed filaments, the tuft 12 to 19 mm. in 
diameter. 
It grows in deeper water but is often cast up by storms. It occurs on 
both sides of Bass Strait. T have not seen it from west of Port Fairy but 
it is to be hoped that it will be met with off Cape Northumberland ' ’ 
D 
