OF SOUTH AUSTRALIA. 
227 
2. Frond thick and stiff. Midrib present with 
long linear prolifications from it on each 
side. Cystocarps borne singly on sporo- 
phylls from the midrib of the linear 
leaves. Tetrasporangia in a sorus occupy- 
ing the middle surface of the sporophyll 
3. Frond thick, narrow. Midrib present with 
linear leaflets prolificating from the mid- 
rib on each side. These similarly prolifi- 
cate, and so on till the frond assumes a 
multo-pinnate form. Cystocarps single 
over the midrib of a sporophyll. Tetra- 
sporangia in twin sori on each side of 
the sporophyll 
b. Delicate transverse veins present. Thin like 
Hypoglossum and with cystocarps and 
sori of tetrasporangia in sporophylls 
prolificating from the midrib 
B. — Sori of tetrasporangia not evolved in special 
sporophylls. Midrib interrupted, cystocarps 
imposed on the midrib. Sori of tetrasporangia 
forming several sub-seriate spots within the 
margin of the frond on each side 
Chauvinia 
Harvey. 
Phitymophora 
J. Agardh 
Apoglossum 
J. Agardh. 
Hemineura 
Harvey. 
HYPOGLOSSUM Kutzing. 
A beautiful genus of delicate texture, mainly Australian (13 species) 
with three exotic species. The finest are H. dendroides from Western Aus- 
tralia and H. serrulata from Botany Bay; each from 20 cm. to 50 cm. 
high. They are plants growing in deeper water, and so are rarely met 
with on the beach. Frond is simple, usually more or less lanceolate in out- 
line, entire or toothed or laciniate on the margins. The midrib is conspicu- 
ous, and from it the cells pass in arcuate transverse rows to the margin. 
Cystocarps singly over the midrib. Sori in small sporophylls arising from 
either side of the midrib. Only three of the species have been recorded 
from South Australia, but one or two others are included below as likely 
inhabitants. 
Hypoglossum spathulatum (Kiitz.)J. Agardh. 
Fronds linear-lanceolate, to 10 cm. high and 2 mm. to 6 mm. wide, 
narrowed at both ends. Midrib slender, jointed, composed of three layers 
of cells. Prolificating folioles linear-lanceolate, acuminate, with entire 
margins. Colour rosy-carmine. 
As it is known in Western and Eastern States, will probably be found 
in South Australia. 
