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THE SEAWEEDS 
Rhabdonia dendr aides Harvey. 
Stem robust, 20 cm. to 25 cm. high, corneo-cartilaginous, rigid- 
decompound. Upper branches dense, tufted at the extremities. The ramuli 
taper at the apex but not at the base. Colour dull-red. 
Western Australia, Victoria, Tasmania, and South Australia (Encounter 
Bay, Eastern Bays). 
B. — Juvenile frond, and the branches of the adult, sub-articulately con- 
stricted, branches arising at the strictures often verticillate. 
Rhabdonia charoides Harvey. 
Frond flaccid, caespitose, constricted at intervals into pseudo- joints, 
whorled at the nodes with similarly constricted branches, whorled with 
ramuli, internodes of stem and branches fusiform, echinulate, 1 cm. to 3 cm. 
long. Ramuli tapered, often drawn out into tendrils. Height 7 cm. to 
14 cm. Substance soft and delicate. Colour rosy-red. 
Victoria. 
Rhabdonia verticillata Harvey. 
Stem short and thick, beset with wart-like abortive ramuli, emitting 
numerous decompound branches. Branches constricted into pseudo-joints 
which decrease in length upwards, and whorled at the nodes with similarly 
e, cross-section of younger branch; 
f, cross-section of older branch. 
(After Harvey.) 
