OF SOUTH AUSTRALIA. 
105 
Sphaxelaria furcigera Kuetzing. 
Densely caespitose, 2 to 10 mm. high, epiphytic, axes irregularly 
branching. Propagula (gemmae) repeatedly forked. Globose unilocular 
sporangia, ovoid-cylindrical plurilocular sporangia borne on a pedicel. 
Red Sea, Indian and Pacific Oceans. Dirk Hartog Island, Western Aus- 
tralia. Cape ^ ork, Queensland. South Australia, determined by Reinbold. 
CLADOSTEPHUS J. Agardh. 
Frond filiform, virgate, branching, clothed with verticils of short, 
articulate, polysiphonious ramuli, composed of three strata of cells, an 
axial of longitudinally prismatic cells, an intermediate of larger rounded- 
angulate cells, and a cortical of minute rounded cells. Unilocular sporangia 
globose, plurilocular ovoid. 
Cladostephus spongiosus (Light!) J. Agardh. 
Frond irregularly decompound-dichotomous; ramuli short, simple, not 
regularly whorled, densely imbricate. Height to 15 cm. 
Cladostephus verticillatus (Light!) J. Agardh. 
I rond decompound forked, ramuli strongly incurved, more or less 
distantly whorled. Height to 13 cm. 
Both widely distributed. The former recorded from South Australia, 
and the latter may be confidently expected. 
STYPOCAULON Kuetzing. 
Frond stiff, treelike ; below densely corticated with descending radical 
filaments, much branching. Structure parenchymatous, formed by divisions 
of an apical cell. Fertile branches evolving from an axillary cell a multi- 
cellular branch from which both kinds of sporangia grow, which became 
congested in a dense sorus. 
Stypocaulon panicidatum ( Suhr. ) Kuetzing. 
Frond notably stupose, to 20 cm. or more high, harsh and stiff. Fruits, 
3 or 4, aggregated in the axils. 
All southern Australia and Tasmania, New Zealand, Cape of Good Hope. 
Stypocaulon funiculars (Mont.) Kuetzing. 
Frond stupose, coalescent, naked near the base. Dioecious, pedicellate 
sporangia, unilocular subglobose, plurilocular ovoid, larger. Not so tall 
as preceding. 
Southern coasts of South America. New Zealand. Recognised by 
Reinbold in Dr. Engelhardt’s material from Guichen and Rivoli Bays, 
South Australia. 
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