108 
Exudations. — Reference should be made to a valuable paper entitled, 
“The possible relationship between Bacteria and the Gum of Hake a saligna ( Bac. 
pseudarabinus , ii, n.sp.),” by R. Greig Smith, D.Sc., in Proc. Linn. Soc. N.S.W., 
xxx, 13(3 (1905). 
The conclusions arrived at in this paper are as follow :— 
1. The gum of HaJcea saligna is neither arabin, metarabin, nor pararabin. The hydrolytic products 
consist of reducing bodies that yield indefinite osazones and are probably akin to the furfuriiids of Cross, 
Bevan, and Smith. It is not pectin, although it approaches this substance in some respects. 
2. Of the bacteria occurring in tbe tissues of the plant, the most probable producer of the gum is 
one intermediate Ivtwten Bad. acacice and its variety Bact. metarabinum, but as we do not yet know that 
the host-plant can alter a gum once formed by a bacterium, it cannot be said that the gum is produced by 
this micro-organism. 
3. Bacteria that produce galactan gums which behave to reagents like arabin are not uncommon. 
A second is described under the name of Bacillus pseudarabinus, ii, n.sp. (Loc. cit. p. 148.) 
Size.— A tliin, spindly slirub or a small tree of 15 to 20 feet, with stem of 
quite a small diameter. 
Habitat. —This is a purely eastern species, being confined to eastern New 
New South Wales and Queensland. 
Robert Brown, however, in Trans. Linn. Soc., x, 185, gives “In Novte 
Hollandiae, ora Australi; Lewin’s Land; in ericetis elevatioribus.” Presumably tbe 
vicinity of Cape Leeuwin is intended, as Brown gives “ Lewin’s Land ” for a number 
of indubitable West Australian plants. 
Smith, in Trans. Linn. Soc., ix, 124, in his “ Sketch of the genus Concilium ,” 
says of this plant:—“ C. salignum, Bonn, Cant. 21 ” (this is a mere list of plants.— 
J.U.M.), “A native of the country near Port Jackson. It flowered at Messrs. 
Lee and Kennedy’s (Hammersmith, near London) in 1791, and in the Conservatory 
of Thomas Jobnes, Esq., of llaford, in June, 1798.” 
Following on the localities quoted in the Fiora Australiensis — 
Queensland. —Araucaria Ranges ( Leichhardt ); Brisbane River, Moreton Bay (.4. Cunningham, 
F. Mueller). 
New South Wales .—-Port Jackson, to the Blue Mountains (R. Brown and many others); Argyle 
County (Fraser); New England ( C. Stuart). 
Bailey gives, in addition, Wallangarra (N.S.W.-Queensland border) and Stanthorpe 
(Queensland), a few miles further on. 
I have it in tho National Herbarium, Sydney, from Cambewarra Mountain 
(J. L. Boorman) ; Jenolan Caves (W. F. Blakely) ; near Port Macquarie (J.H.M.); 
near Torrington, Emmaville District (J. L. Boorman) ; Woodburn, also Myrtle 
Creek, both Richmond River, very broad leaves (W. Baeuerlen) ; Drake, very broad 
leaves (J. L. Boorman) ; Acacia Creek, Macpherson Range, very broad leaves 
(W. Dunn). 
