OF SOUTH AUSTRALIA. 
269 
wide; tetrasiphonous, lower articulations longer than broad, upper about 
as long as broad. Colour pale violet-red, drying black. Substance carti- 
laginous. Adheres to paper. 
Western Australia (epiphytic on Polyphysa peniculns , King George 
Sound). 
Polysiphonia ferulacea Suhr. 
Syns. P. litt oralis Harvey mscr; P. breviarticidata Harvey; J. Ag. Sp. 
II., 3, p. 980 ; De Toni Syll. Alg. IV., 892. 
Fronds caespitose, 6-15 cm. long, dense, rising from intricate rooting 
masses. Stems slender, mostly undivided below, irregularly dichomotous 
above, subfastigiate, one branch of a dichotomy often shorter than the 
other, all axils very acute. In fertile plants the dichotomous lateral 
branches are short, dense, irregularly fastigiate, basal part swollen with 
tetrasporangia, long and attenuate above; ramuli of sterile plants often 
simple, usually sparse, less attenuated, apices obtuse ; lower ramuli patent, 
upper erect. Articulations in whole frond of subequal length, diameter 
shorter or equal to length ; tetrasiphonous, ecorticate. Lower nodes swollen, 
ascending stem often emitting rooting filaments downwards. Tetraspores 
in lateral fastigiate ramuli, distorted below the apices; extra lateral ramelli 
prominent. Cystocarps on upper branches, below the apices, sessile, globose, 
ovate. Colour reddish. 
South Australia (Eastern Bays) , .Western Australia, Tasmania, Gulf of 
Mexico, Indian Ocean. 
Polysiphonia havanensis Montagne. 
Kiitz. Tab. Phyc. XIII, t. 72 ; De Toni Syll. Alg. IV, 894. 
Fronds caespitose, erect, elongate, stems at base articulate and forming 
nodose masses ; irregularly dichotomous, more or less dense, virgate ; ramuli 
long, attentuated, patent. Tetra-siphonous, articulations below 6 times, 
above 2-3 times, as long as broad. Tetrasporangia in unequal ramuli, ver- 
rucose, sparse. Cystocarps ovate, sessile on upper branches. Colour red- 
brown. 
South Australia, Western Australia, Havana, Cuba, Florida. Ilarvey 
records this species from Lake King, which is 22 miles east of Lake Frome, 
in the north of South Australia. This lake is probably little more than a 
large salt pan, but it is a remarkable place to find a Polysiphonia. 
Polysiphonia Blandi Harvey. 
Harv. Phyc. Aus. t. 184; De Toni Syll. Alg. IV, 899. 
Fronds solitary or few together, not entangled 6 cm. to 10 cm. long, 
about i mm. thick, repeatedly but irregularly forked; the lowest divisions 
mostly dichotomous, the upper more alternate; all the lower naked, with 
distant forks and acute axils; the upper somewhat virgate, closely set 
throughout with short multifid ramuli. Ramuli 4-6 mm. long, corymbose, 
alternately multifid; all their divisions densely fibrilliferous, with dark- 
coloured dichotomous fibres. Articulations short; the lower little longer 
than the upper, none more than three times as long as broad, tetra- 
siphonous, with thick walls. Tetraspores in distorted ultimate ramuli. 
