OF SOUTH AUSTRALIA. 
61 
ff. Vesicles not distinct from other organs, 
g. Vesicular inflations in terminal 
leaves Cystophyllum 
J. Agardh. 
gg. Vesicular inflations in the primary 
branches Cystoseira 
C. Agardh. 
aa. Receptacle not specialised from the frond segments, 
h. Leaves peltate, fleshy, warted externally, 
spirally inserted round the stem Scaberia 
Greville. 
hh. Leaves taking the form of a flattened stem. 
i. Cauline vesicles present Phyllospora 
C. Agardh. 
ii. Vesicles absent. 
j. Leaves not ribbed Garpoglossum 
Kuetzing. 
jj. Leaves ribbed Myriodesma 
Decaisne. 
The genera Carpophyllum and Turbinaria are not known from South 
Australia. Carpophyllum flourishes in New Zealand, Turbinaria in 
tropical and subtropical seas. 
SARGASSUM C. Agardh. 
Frond consisting of a vertical branched axis, with a much abbreviated 
stem or main stipes (2.5 to 5 cm. long), and bearing long branches 
with leaves, vesicles and receptacles developed as distinct organs. Leaves 
Pig 39. Foliage and floats of Sargassum—(a,) S. ( Phyllotricha ) decipifns; (b) S 
( PhyUotricha) various ; (c) S. ( PhyUotricha ) Sonderi ; (d) S. ( Arthrophycus ) 
failax ; (e) S. (Arthrophycus) undulatum ; (f) S. ( Eusargassum ) cristatum; 
(g) S. (Eusargassum) berberifolvum. (h-j) Floats of Arthrophycus ; 
(h) aristate; (i) leaf-bearing; (j) mntic. 
