In venturing to add another species to the genus Peyssonelia, 
IT am not unmindful of the P. Nove-Hollandia, Kutz., of which 
the character given by Kiitzing would answer very well for the 
plant now figured under a different name. My reasons for re- 
garding our present plant as distinct are, that 1 am acquainted 
with a Peyssonnelia from the south coast which I take to be 
identical with Kiitzing’s plant, and which differs from that now 
figured in colour, surface, and ramification; and that the plant 
now figured comes from a part of the east coast from which few 
collections have reached Europe. ‘This is the most erect,—that 
is, the least horizontal, of the genus, the root-fibres of the lower _ 
surface having nearly disappeared. ‘The cellular structure is 
identical with that of P. squamosa. 
Fig. 1. PEYSSONNELIA AUSTRALIS,—the natural size. 2. Vertical section of 
the frond :—magnified. 
