.1 



THE 



Transactions 



OF 



The Royal Society of South Australia. 



Vol. XLII. 



on the Habitat and method of occurrence in 

 South Australia of two Genera of Lycopods 

 hitherto unrecorded for the state. 



By T. G. B. Osborn, M.Sc, Professor of Botany in the 

 University of Adelaide. 



[Read November 13, 1917.] 



Plate I. 



In the course of his presidential address to Section K 

 (Botany) of the British Association delivered at Sydney in 

 1914 Professor Bower remarked that "the most peculiar living 

 lycopods are certainly Isoetes and Phylloglossum." At that- 

 time neither of the two genera were included in the South 

 Australian flora. It is the purpose of this note to record their 

 occurrence, together with certain observations that seem of 

 interest upon the plants as they grow in the field ; for it 

 appears at least worthy of remark that in South Australia 

 Isoetes and Phylloglossum occur side by side as members of a 

 flora specialized to peculiar edaphic and climatic conditions. 



Isoetes. 



The species of Isoetes to be recorded is Isoetes Drum- 

 mondii, A. Br. Bentham (1 : p. 672) gives the locality for 

 this species as Swan River, and in Sadebeck's monograph on 

 the genus (10: p. 776) this is the only locality cited. Von 

 Mueller (8: p. 506) records it for the southern district of 

 Victoria, with the remark that it is always submerged. The 

 new census of New South Wales plants (7: p. 8) records it for 

 that State, and in a letter Mr. Maiden states that "it is recorded 

 from Pine Mountain on the Upper Murray River, and also 

 from a mountain 2,500 feet high on the Victorian side of the 

 Murray." This record is apparently that given by Ewart and 

 Rees (6: p. 5). 



