144 R. H. CAMBAGE. 



The two further species which produce au opposite pair 

 of pinnate leaves are : — 



Acacia galioides, Benth., and A. Murrayana, P.v.M. 



A.galioides has a considerable range in tropical Australia, 

 while A, Murrayana occurs in north-western New South 

 Wales, in Queensland, and South Australia. 



In the case of]A. homalophylla, (Yarran), three seedlings 

 produced one simply-pinnate leaf, but the fourth seedling 

 had an opposite pair. Out of about 500 seedlings of about 

 70 Acacia species examined, this is the second instance 

 where a species has been noticed to produce a single pinnate 

 leaf and also an opposite pair next after the cotyledons. 

 The previous case was that of A. aneura, (Mulga). All 

 others have fallen wholly into one group or the other. 

 These two species, therefore, may be regarded as being in 

 a transition stage, more examples of which will probably 

 be found among other species. 1 



Vitality of Seed in Sea-water. 



When discussing, in Part I, the possibility of seeds being 

 transported long distances by oceanic currents, it was 

 mentioned that seeds of Acacia Farnesiana from Central 

 Queensland had germinated after having been immersed in 

 sea-water for 148 and 190 days respectively. Since then, 

 a seed of this same species from the same locality, which 

 had been in a bottle of sea- water for 405 days, and was 

 shaken from month to month, was taken out and placed in 

 a cup which was then filled with boiling water and allowed 

 to remain standing for a couple of hours, after which the 

 seed was planted. At the end of five weeks the seed had 

 not germinated, and was taken out of the soil and found to 

 be still perfectly sound. It was again placed in boiling 

 water as before, and then planted. As it showed no change 

 at the end of a further nine weeks, it was again removed 



1 This Journal, Vol. xlix, (1915), pp. 82-85. 



