30 Dansk Botanisk Arkiv, Bd. 2. Nr. 8. 



A Revision of the West Australian 



Species of Triglochin, Crassula (Tillæa) 



and Frankenia. 



By 



C. H. Ostenfeld. 



The flora of the extra-tropical region of West Australia — 

 especially that of the south-western part — has been studied by 

 many botanists, and is nowadays well investigated. It is there- 

 fore not to be expected that my collection, made in places often 

 visited by collectors, should bring much that is new; and I do 

 not think it worth while to publish a full list of the species of 

 which I have brought specimens home. 



Still, when working at the identification of my plants, I find 

 here and there some additions and records which may prove to 

 be of interest, and which I intend to publish later on; and in 

 some cases the examination of my material has brought me into 

 a closer study of groups which seem to have been neglected. 

 When possible, I have then tried to get as ample material for 

 comparison as possible, and have several times succeeded in ob- 

 taining sufficient material for a revision of a group or a genus, 

 at least as far as W. A. is concerned. Such has been the case 

 with the three genera Triglochin, Crassula and Frankenia, a re- 

 vision of which I am publishing here. 



I am much indebted to several gentlemen who have procured 

 material for me, as will be acknowledged below. I may especi- 

 ally mention Mr. J. H. Maiden, F. R. S., of Sydney, Professor 

 A. J. Ewart of Melbourne, Mr. J. M. Black of Adelaide and Pro- 

 fessor L. Diels af Berlin. 



I. Triglochin (Plate IV). 

 Besides the larger perennial species — viz. T. striata Ruiz & 

 Pav. and T. procera R. Br. — , several small annual species of the 

 genus occur in West Australia. As I happened to collect some 



