NATIVE FLORA OF TROPICAL QUEENSLAND. 433 



Acacia Farnesiana (Needle Bush or Prickly Mimosa) 

 was seen as spreading shrubs practically the whole way 

 from Normanton to Oloncurry, and is a common Queensland 

 species as well as being indigenous in other tropical coun- 

 tries. Its seeds will germinate after having been immersed 

 in sea water for six months. (This Journal 1915, p. 94). 



Acacia Sutherlancli is remarkable for its long pendulous 

 branches (Plate LX), and is known as Cork Tree and Weep- 

 ing Mimosa. It grows in clumps on the plains near the 

 lower Flinders, and is from thirty to fifty feet high, the 

 trunk being usually covered with a rough corky bark, very 

 similar to that of A. Bidwilli, an erect tree. 



The trees identified as Eucalyptus microtheca (Ooolabah, 

 No. 4002) extend for very many miles along the lower 

 Flinders, often growing on low flat land subject to inunda- 

 tion by floods. The trees range from thirty to forty feet 

 high with a very dark grey box bark on the trunk, and a 

 lighter grey on the branches, so that in general appearance 

 they are exactly similar to trees of E. bicolor A. Ounn., 

 (E. largiflorens F.v.M.). The fruits obtained are arranged 

 in panicles on slender peduncles and are almost hemi- 

 spherical, 3 mm. long, and 3 mm. across, the valves not 

 protruding beyond the rim except in a very few cases and 

 then only to the extent of about '3 mm. The wood examined 

 is very deep brownish-red to almost black. 



These trees differ in two particulars from those recognised 

 as E. microtheca on the Darling River around Bourke, in 

 that the latter have smooth, perfectly white branches, and 

 valves exserted in a most pronounced manner. Both favour 

 basic rather than siliceous soils. The wood of the Bourke 

 trees is brownish-red, of a lighter shade than that of the 

 Gulf Ooolabah, but it is considered by some who live near 

 the Flinders that those trees which are inundated during 

 the wet season have darker timber than those above the 



Bb— December 1, 1915. 



