100 
THE SEAWEEDS 
Peritkalia inermis (R. Br.) J. Agardh. 
Frond 30 to 60 cm. high, bushy, resembling a disciplinary birch. Stems 
clothed near base with brownish woolly filaments, and rough from remains 
of broken-off branches. Colour a clear brownish olive. Substance wiry. 
South Australia, Victoria, Tasmania. 
SPOROCHNUS C. Agarclh. 
Frond filiform, solid, pinnately decompound. Holdfast a conical disk. 
Apices of the branchlets crowned with a pencil of soft hairs, later trans- 
formed into sporangiferous oblong, ovate, or spherical, receptacles. 
Interior stratum of the frond of longitudinal threads, the exterior stratum 
of minute coloured cells in a single layer. Receptacles crowned with a tuft 
of hairs, and closely covered with whorled, articulate, dichotomous, spori- 
ferous filaments. Sporangia obovoid, unilocular, attached to the sides of 
the filaments. 
Sporochnus pedunculatus (Huds.) C. Agardh. 
Frond cylindrical, densely pinnate, with long alternate mostly simple 
branches. Receptacles numerous, obovate-ellipsoid, with rather long 
pedicels. 20 cm. high. 
Southern Australia. Eastern Atlantic and Mediterranean. 
Sporochnus comosus C. Agardh. 
Like the preceding but repeatedly decompound. Receptacles club-shaped 
cylindrical on pedicels much shorter than themlselves. Colour olive-green, 
of the plumes bright green, in both species. 30 to 90 cm. high. 
All Southern Australia and Tasmania. 
Sporochnus gracilis J. Agardh. 
A slenderer form of S. comosus with longer pedicels. This is not recog- 
nised as a species by De Toni. 
Encounter Bay. 
Sporochnus radiciformis (R. Br.) Agardh. 
Frond terete, rigid, slender, tree-like, 30 to 60 cm. high. Branches 
decompound spreading every way. Receptacles spherical or oval, on 
pedicels much longer than themselves. 
West and South coasts of Australia, Tasmania. 
Sporochnus scoparius Harvey. 
Frond terete, rigid, robust, coated to a considerable degree with velvety 
hairs, tree-like with stiff erect branches, 30 to 90 cm. high. Receptacles as in 
S. radiciformis . A much coarser plant than the preceding, with a large 
hairy attachment. 
Western and South Australia, Victoria. 
