OF SOUTH AUSTRALIA. 
283 
long, subulate, transversely striate. Colour dark reddish or chestnut- 
brown. Cystocarps ovate-globose, wide-mouthed, sessile, on the sides of the 
marginal teeth. Stichidia corymbose, terete, verrucose. 
South Australia (Encounter Bay, Investigator Strait, Eastern Bays), 
Tasmania, Western Australia. 
Subfamily Lophothalieae Schmitz and Falkenberg. 
BRONGNIARTELLA Bory. 
Fronds of radial construction, furnished with a pile of subdichotomous, 
spirally disposed branches. Axis polysiphonous, pericentral cells five to 
seven (rarely four), for a long time bare or else later covered with densely 
confluent rhizoids. Growth monopodial, apical cell transversely articulate. 
Lateral ramuli from basal cells forming a pile, transformed partly into 
short fruiting branches, partly into prolonged branches. Cystocarps and 
antheridia as in Polysiphonia. Tetrasporangia numerous in ramuli with or 
without stichidia formation, single in each articulus, disposed in linear longi- 
tudinal spirals. Diagnosed from Polysiphonia mainly by the pile of 
coloured, monosiphonous, persistent ramelli, a habit peculiar to this genus. 
Brongniartella australis (Ag.) Schmitz. 
= Polysiphonia Cladostephus Montagne. 
Frond 15 cm. to 50 cm. long, about 1 mm. thick below, setaceous in the 
principal branches, distinctly pointed in every part, seven-tubed ; the main 
branches naked at the base, irregularly divided, their upper part and all 
the lesser divisions densely whorled with single-tubed dichotomous ramelli, 
which spring from every joint, and are about 2 mm. in length. Cystocarps 
ovate, sessile on the branches at the base of the multifid ramelli. Tetra- 
sporangia in the smaller branchlets. Colour a dull brownish-purple. 
South Australia (Investigator Strait), Western Australia, Tasmania New 
Zealand. 
* Brongniartella Patersonis (Sond.) De Toni. 
= Polysiphonia spinosissima Harvey. 
Frond to 15 cm. high, pinnate, irregularly branched, at the base articulate 
and ecorticate; the ramelli very dense, almost vertical; simple and spinose 
below; above subdichotomous, bare at the apices. Seven to eight siphons. 
Tetrasporangia scattered on the rough ramelli. Cystocarps ovate, sessile. 
South Australia (Investigator Strait), Victoria, Tasmania. 
Brongniartella strobilifera (J. Ag.) Schmitz. 
Frond terete, corticate, pinnate, irregularly branched, the ramelli fasci- 
culate, growing from the racliis in the adult plant; the rachis knotted below 
and irregularly branched above. Ramelli monosiphonous, rigid, the lower 
ones abrupt, the upper ones slightly curved, articulate throughout 
Stichidia densely clustered, ascending spirally around the rachis, protru- 
berant. Cystocarps ovate, subglobose, shortly pedicellate, prominent. 
South Coast of Australia. 
See footnote on page 276. 
