23 



In habit, carpophore, and petals this species might belong to 

 Slum, but the absence of calyx-teeth and the solitary vittas 

 are not characters of that genus. Specimens forwarded to 

 two great botanical establishments have been determined 

 variously as Sium latifolium, L., and S. erectum, Huds. (S. 

 angusti folium, L.), evidently without examination of the 

 fruit. In the Natwalized Flora of S.A., p. 71, I described 

 it under the name of Sium latijugum,, Clarke. This is an 

 Indian species, for whose inclusion in Sium Clarke altered one 

 of the generic characters by making the furrows of the. fruit 

 univittate. Since then specimens have been sent from South 

 Australia to Calcutta and carefully examined by the Director 

 of the Royal Botanic Garden at Sibpur (Major Gage) and 

 Mr. M. S. Ramaswami, who find that our plant differs from 

 S. latijugum in the narrow slender ridges of the carpels and 

 in the shape of the leaflets. They advise placing it in Apium 

 and instance its resemblance to A. nodiflorum, Reichb. It 

 seems to me, however, that the bipartite carpophore and the 

 emarginate petals exclude it from that genus, and I have 

 placed it in Garum, with which it agrees very fairly, especially 

 when the generic character is extended so as to include 

 Petroselinum, Hoffm. Although in our plant the branches of 

 the carpophore usually remain united to the carpels and fall 

 off with them, they are sometimes seen, in the ripe fruit, free 

 from them for a considerable part of their length. It is 

 only in specimens from Nuriootpa that I have found 1 or 2 

 pinnatifid bracts in the involucre, and of these specimens I 

 have not been able to obtain fruits. The plant here described 

 is very probably the Sium latifolium, L., mentioned in Fl. 

 Aust., iii., 336, as an introduction. There can be little 

 doubt that it is a native. (Plate iii.; 1, flower; 2, petals; 

 3, transverse section of fruit; 4, fruit.) 



Composite.— Helipterum floribundum, D.C., var. nova tubu- 

 lipappum. Corollse lobis insequalibus, uno profunde 

 inciso, pappi setis planis 6-8, dimidio inferiore in tubulum 

 connatis. 



Oodnadatta (Miss Staer). A variety with slightly woolly, 

 rigid branches, the involucral bracts all pure white, as in the 

 type, but pappus semitubular, as in H. Troedelii, F. v. M. 

 Similar specimens from Mount Lyndhurst, labelled "H. 

 fioribundum," are in the herbarium of the Museum of Econ- 

 omic Botany. Differs not only in pappus, but in the larger 

 leaves and stouter stems, from the slender form found in the 

 mallee country from Dublin northwards towards Port 

 Augusta, with the outer bracts golden-brown and the appear- 

 ance of an annual ( ? var. Sturtianum, Benth.). The flowers 



